Question

If 1% of an airline's flight suffer a minor equipment failure in an aircraft what is the probability that there will be exactly two such failures in next 100 flights

Answer 1

Answer:

¹⁰⁰C₂(1/100)²(99/100)⁹⁸

0.185

Step-by-step explanation:

1% of an airline's flight suffer a minor equipment failure in an aircraft

=> Probability of Failure = 1/100

p = 1/100

q = 99/100

2 out of 100 Can fail in ¹⁰⁰C₂ ways

probability of failing of two = (1/100)²

probability of not failing remaining 98  =  (99/100)⁹⁸

Probability of Exact two Failures

= ¹⁰⁰C₂(1/100)²(99/100)⁹⁸

= 0.185