Question 421281

probability of fail = 0.02 = 2/100 

probability of not fail = 1 / 2/100 = 98/100


(A) both will fail = 2/100 * 2/100 = 4/10000 



(b)  neither will fail = 98/100 * 98/100 



(c) one or other will fail = 2/100 * 98/100 + 98/100 * 2/100 

= 392/10000