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A JEE aspirant estimates that she will b...

A JEE aspirant estimates that she will be successful with an 80 percent chance if she studies 10 hours per day, with a 60 percent chance if she studies 7 hours per day and with 40 percent chance if she studies 4 hours per day. She further believes that she will study 10 hours, 7 hours and 4 hours per day with probabilities 0.1, 0.2 and 0.7 respectively. Given that she is successful, What is the chance that she studies for 4 hrs?

A

`(1)/(12)`

B

`(5)/(12)`

C

`(7)/(12)`

D

`(11)/(12)`

Text Solution

Verified by Experts

The correct Answer is:
(c)
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