If the probability of an event occurring is 1/y, what is the probability that the event will not occur?

A. y
B. y-1/y
C. y/y-1
D. 1-y/y

Is it B?

yes

To find the probability that an event will not occur, we subtract the probability that it will occur from 1.

In this case, the probability of the event occurring is 1/y. So, the probability that it will not occur is 1 - 1/y.

To simplify this expression, we need a common denominator. The common denominator for 1 and y is y. So, we have (y - 1)/y.

Therefore, the correct answer is B.