Question

If for any two events A and B, P(A) = `4/5` and P(A ∩ B) = `7/10`, then `P(B/A)` is equal to ______.

Options

• `1/10`

• `1/8`

• `7/8`

• `17/20`

Answer 1

If for any two events A and B, P(A) = `4/5` and P(A ∩ B) = `7/10`, then `P(B/A)` is equal to `underlinebb(7/8)`.

Explanation:

P(A) = `4/5`, P(A ∩ B) = `7/10`

So `P(B/A) = (P(B ∩ A))/(P(A))`

= `(7/10)/(4/5)`

= `7/8`.