The probability of pulling a black ball out of a glass is 1/X. The probability of pulling a black ball out of a glass and breaking the glass is 1/Y. What is the probability of breaking the glass?	Choose the correct choice from the following.
A) 1/(XY).
B) Y/X
C) X by Y
D) 1/(X+Y).
E) 1/(X-Y).
pulling a black ball out of a glass and breaking the jar both are independent events.   For 2 independent events, we know, P(a) * P(b) = P(a∩b)   If Prob of pulling a black ball out of a glass = P(a) and Prob of breaking the glass= P(b)   1/x * P(b) = 1/y ---&gt; P(b) = x/y   Hence, answer should be X by Y.
<result>C</result>
The probability of pulling a black ball out of a glass is 1/X. The probability of pulling a black ball out of a glass and breaking the glass is 1/Y. What is the probability of breaking the glass?