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 one year ago
The manager of a gas station and convenience store tabulates the following facts:
40% of customers purchase gasoline (G).
36% of customers purchase cigarettes (C).
61% of customers purchase gasoline or a drink (D).
9% of customers purchase gasoline and cigarettes.
14% of customers purchase a gasoline and a drink.
15% of customers purchase cigarettes and a drink.
2% of customers purchase all three items.
(a) If we randomly select a customer, what is the probability that she purchases gasoline or cigarettes?
(b) If we randomly select a customer, what is the probability that
 one year ago
The manager of a gas station and convenience store tabulates the following facts: 40% of customers purchase gasoline (G). 36% of customers purchase cigarettes (C). 61% of customers purchase gasoline or a drink (D). 9% of customers purchase gasoline and cigarettes. 14% of customers purchase a gasoline and a drink. 15% of customers purchase cigarettes and a drink. 2% of customers purchase all three items. (a) If we randomly select a customer, what is the probability that she purchases gasoline or cigarettes? (b) If we randomly select a customer, what is the probability that

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hartnn
 one year ago
Best ResponseYou've already chosen the best response.3P(A or B) = P(A)+ P(B)P(A and B) here, A = gasoline, B =cigarette

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3you know all 3, P(A),P(B),P(A and B) just plug in values!

hartnn
 one year ago
Best ResponseYou've already chosen the best response.340% = 0.4 and P(G and C) is given as % = 0.09

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0what about P(A and B)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3what you got as final answer ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3lets check, P(G or C) = 0.4+0.360.09 = 0.760.09 = 0.67 yes, you are correct :)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3you haven't posted question for b

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0If we randomly select a customer, what is the probability that she purchases a drink

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3can you make a venn diagram for your question ?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0can you give me some idea?

tcarroll010
 one year ago
Best ResponseYou've already chosen the best response.1dw:1362261956915:dw

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3yes^ from that can you find probability of drink ? just add all the values in D circle.

tcarroll010
 one year ago
Best ResponseYou've already chosen the best response.1Makes you wonder what the last 25% are doing. Using the washroom or casing the joint.

tcarroll010
 one year ago
Best ResponseYou've already chosen the best response.1That looks good to me.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0t more quick questions

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

tcarroll010
 one year ago
Best ResponseYou've already chosen the best response.1You might want to go over how to do that diagram. That's a fundamental skill for these types of questions.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0(d) Which of the following statements is true? C and D are mutually exclusive. G and D are mutually exclusive. G and C are mutually exclusive. None of the three pairs of events are mutually exclusive.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3mutually exclusive events have intersection = 0 or if P(A and B)=0, then A, B are mutually exclusive.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3so, do you find any such pair here ?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0G and D are mutually exclusive.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3G and D = 12+2 , its not 0

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0None of the three pairs of events are mutually exclusive.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0what about the previous one about independent?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3for independent , P(A and B) = P(A)*P(B) so, you need to check this for all 3 pairs.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0pg and pd , i got 0.14

yashar806
 one year ago
Best ResponseYou've already chosen the best response.014% of customers purchase a gasoline and a drink P（g and d）so it;s going to be 0.14

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3'or' ?? you need to use 'and'

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3P（g and d）so it;s going to be 0.14 is correct

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0G and C we have 0.65

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3then G and D are not independent.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3similar check for other 2 pairs.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0why they are not independent?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0so None of the three pairs of events are independent.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0ok last question, i actually got the answer could you help me to check it?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0What is P(C Dc), i.e., the probability that a randomly selected customer purchases cigarettes but not a drink?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0thank you very much?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0answer is not None of the three pairs of events are independent

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3i didn't calculate for all 3, but looking at numbers, i think its None...

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0can you help me to check it please?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.3i still get none :( lets have a 2nd opinion by @tcarroll010

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0im not sure, what are independent

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Independent means that the occurrence of one does not affect the probability of the other.

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Is there just one answer?

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0in this one, what are independent

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0yeah, they are multiple choice

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Then I guess I would choose G and C

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Because I can't see how one affects the other.

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Do you get another chance?

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0And you already tried "none"?

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0So it's a 5050 chance. Let's see if we can pick out any difference in the two remaining choices.

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0C & D don't mention the same commodity. If I had to guess, (and I would be guessing) that's what I would put.

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0my queststion is this

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following statements is true? G and D are independent. G and C are independent. C and D are independent. None of the three pairs of events are independent

yashar806
 one year ago
Best ResponseYou've already chosen the best response.0cuz , we are not sure

bambimonster
 one year ago
Best ResponseYou've already chosen the best response.0Hey so what did u get in the end? Is it c and d
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