Question

In a school there are 1000 students, out of which 430 are girls. It is known that out of 430, 10% of the girls study in class XII. What is the probability that a student chosen randomly studies in Class XII given that the chosen student is a girl?

Answer 1

here we have to find `P(A|B) = ?`
Given that `P(A)=430/1000`
`P(A nn B) = ((10/100)430)/1000 `
`=43/1000`
`P(B|A) = (P( A nn B)) /(P(A))`
`=43/1000*1000/430 = 1/10`
answer