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yashar806
 2 years 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
yashar806
 2 years 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
 2 years 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
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.340% = 0.4 and P(G and C) is given as % = 0.09

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

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

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

yashar806
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.3can you make a venn diagram for your question ?

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

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

hartnn
 2 years 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
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.1That looks good to me.

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

yashar806
 2 years 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
 2 years 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
 2 years 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
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.3so, do you find any such pair here ?

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

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

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

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

hartnn
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.0pg and pd , i got 0.14

yashar806
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.3'or' ?? you need to use 'and'

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

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

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

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

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

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

hartnn
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.0can you help me to check it please?

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

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

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

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

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

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

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

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

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

Mertsj
 2 years 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
 2 years 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
 2 years ago
Best ResponseYou've already chosen the best response.0my queststion is this

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

bambimonster
 2 years 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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