Question

Q. If the probability for X and Y to pass in an examination is 0.7 and 0.8 respectively.
then find the probability that at least one of X and Y fails​

Answer 1

Step-by-step explanation:

PE for X to pass exam = 0.7

Probability for not happening of an event = 1 - PE

PE for X to fail in exam = 1 - 0.7 = 0.3

PE for Y to pass exam = 0.8

Probability for not happening of an event = 1 - PE

PE for Y to fail in exam = 1 - 0.8 = 0.2

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