Question

A local video store owner is examining his two stores, the one on 29th Avenue and the other on Division. The 29th store does 70% of the dealers business and the Division store does the rest. In the Division store, 40% of all rentals are DVDs. In the 29th store, 30% of all rentals are DVDs. If a customer is selected at random, what is the probability that she will rent a DVD?

Answer 1

costumer ?

Answer 2

I fixed it

Answer 3

can you ss a question written in your course book ?

Answer 4

are you saying this is a course book question?

Answer 5

what i mean is the question is confusing. Can you send me the link of the source or ss.

Answer 6

can you do that ?

Answer 7

no, because this is a homework question so there is only my sheet of paper

Answer 8

i see. Sorry can't help you with it.

Answer 9

no problem

Answer 10

have you tried? know how to start?

Answer 11

work is this:
70% in roomA, and 30% in roomB
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we ask the 700 people in roomA if they got a DVD, and 30% of them say yes

we ask the 300 people in roomB if they got a DVD, and 40% of them say yes
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so, out of 1000 people, how many are there altogether that have a DVD?

7*30, and 3*40 .. 210+120 = 330
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330 people out of 1000 have a DVD

Answer 12

0.33

Answer 13

lets verify it using my way.

she will rent the DVD when
she chooses the 29th store(70%) AND chooses a DVD (30%)
OR
she chooses Division store(30%) AND she chooses a DVD (40%)

= 0.7*0.3 + 0.3*0.4

= 0.3*1.1
= 0.33

good!

Answer 14

AND -- multiplication,
OR -- addition

Answer 15

ok thank you

Answer 16

welcome ^_^