anonymous
  • anonymous
A.)Determine the probability that the sale chosen at random is a house for sale between 3 and 4 years old.... B.) What are the odds that the house is less then 9 years old AGE: # Houses Sold: 1-2 1280 3-4 1580 5-6 1650 7-8 1510 9-10 1500
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
okay, lets do this together. what is the total number of houses?
anonymous
  • anonymous
7520
anonymous
  • anonymous
okay, what is the number of houses between 3 and 4 years old?

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More answers

anonymous
  • anonymous
1580
anonymous
  • anonymous
okay. so what is the probability that any one of the 1580 houses will be chosen, given that there are 7520 total houses?
anonymous
  • anonymous
5940?
anonymous
  • anonymous
i have no idea
anonymous
  • anonymous
do you know anything about probability and sample sets?
anonymous
  • anonymous
not yet
anonymous
  • anonymous
then why are you doing this problem if you don't know probability?
anonymous
  • anonymous
because i need to learn how
anonymous
  • anonymous
okay. then I will explain probability to you. suppose you have a dice. you roll it. what are the chances that it will land on the number 4?
anonymous
  • anonymous
1/6
anonymous
  • anonymous
yes. so there are one in 6 chances that the dice will roll 4. what are the chances that the dice will roll an even number?
anonymous
  • anonymous
1/2
anonymous
  • anonymous
right. so what were are calling chances, are formally called probability. probability of outcome that you want = set of the outcomes you want/set of all outcomes
anonymous
  • anonymous
so set of outcomes you want for the dice to roll even number is {2,4,6}. set of all outcomes is {1,2,3,4,5,6}.
anonymous
  • anonymous
ok i understand...so in relation to that problem
anonymous
  • anonymous
so what is the set of outcomes you want?
anonymous
  • anonymous
in my problem?
anonymous
  • anonymous
I dont know what that means
anonymous
  • anonymous
okay in the dice problem, the set of outcomes you wanted was of size 3. the set of all outcomes was of size 6. so the probability of even number was 3/6 or 1/2 correct?
anonymous
  • anonymous
correct
anonymous
  • anonymous
so what is the desired outcome in your problem?
anonymous
  • anonymous
I dont know how to figure that out
anonymous
  • anonymous
its given in the problem. the desired outcome is you choose a house 3-4 years old. so how many houses are 3-4 years old?
anonymous
  • anonymous
1580
anonymous
  • anonymous
and what is the set of all outcomes?
anonymous
  • anonymous
7520?
anonymous
  • anonymous
right. you have to choose one house and its set is all the houses in that area. So the set size is 7520. so what is the probability that you choose one of the 1580 houses?
anonymous
  • anonymous
7520/1580...then simplify?
anonymous
  • anonymous
no no. probability is the set of desired/ total. you have done total/desired.
anonymous
  • anonymous
probability cannot be greater than 1.
anonymous
  • anonymous
soo 1580/7520 then simplify
anonymous
  • anonymous
right.
anonymous
  • anonymous
okay so .21
anonymous
  • anonymous
im sure you did the calculation right.
anonymous
  • anonymous
now, for the other part. what are the odds that you choose a house less than 9 years old?
anonymous
  • anonymous
what is the desired outcome?
anonymous
  • anonymous
6020
anonymous
  • anonymous
i know that it is some number to 75
anonymous
  • anonymous
okay so desired outcome/total outcome = ?
anonymous
  • anonymous
6020/7520
anonymous
  • anonymous
.80
anonymous
  • anonymous
ok. you have your answers.
anonymous
  • anonymous
so the answer is what to 75?
anonymous
  • anonymous
what to 75? what does that mean?
anonymous
  • anonymous
because in my problem it says what are the odds the house is less then 9 years old....it has a fill in the blank of ? number to 75
anonymous
  • anonymous
oh okay. then the number you are looking for is 0.8 times 75
anonymous
  • anonymous
60
anonymous
  • anonymous
your probability is 0.8. it can be expressed as 4/5 or 80/100 or 60/75 in your case.

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