Find the probability Andy studies math over break and Betty does not.

Question

The probability that Andy studies Math over break is 0.3 and the probability tha Betty independently studies over break is 0.4.

Answer 1

The Probabilty of Andy studies math over break P(A) is 0.3

The Probabilty of Betty studies math over break P(B) is 0.4

The Probabilty of Betty does not studies math over break = 1 - P(B) ⇒ 1 - 0.4 ⇒ 0.6

The two events(Andy studies math over break and Betty does not studies math over break) are independent events then

The Probabilty of Andy studies math over break and Betty does not studies math over break is

Therefore the Probabilty of Andy studies math over break and Betty does not studies math over break is 0.18.