Question

The probabilities of Bola passing English and Mathematics are x and respectively. y Find the probability of the boy failing both tests​

Answer 1

Explanation:

Prob (passing English) = x

Prob (passing Math) = y

Prob (Failing English) = 1 -x

Prob (Failing Math) = 1 -y

Prob (Failing both test) = Prob (failing English) and Prob (failing Maths) = (1 - x)(1 - y)

so the answer is =1 - (x - y)+xy