Question

in A square minus B square trials of a random experiment is an event is happening a + b times then the probability of happening of event A is given by

Answer 1

The correct option is B). 1
———-
A+B

Answer 2

Step-by-step explanation:

n(s) = a2 -b2

n(a) = a+b

p(a) = n(a)/n(s)

= a+b / a2-b2 = a-b