Question

Could someone explain how to do this question?

Answer 1

`p\left( A|B\right) =0`

Explanation:

Formula:

`p\left( A|B\right) =(p\left( A\cap B\right) )/(p\left( B\right) )`

The only prime outcome is 3

Then

The set A = {3}

1 and 2 are the divisors of 2

Then

The set B = {1 , 2}

Therefore , p(A∩B) = 0

Also p(B) = 0.4+0.1 = 0.5

`\Longrightarrow p\left( A|B\right) =(0 )/(0.5 )=0`