Two brother X and Y appeared for an exam. The probability of selection of X is 1/3 and that of B is 2/7. Find the probability that both of them are selected.	Choose one
A) 2/69
B) 2/21
C) 2/23
D) 2/29
E) 2/10
Explanation:   Let A be the event that X is selected and B is the event that Y is selected.   P(A) = 1/3, P(B) = 2/7.   Let C be the event that both are selected.   P(C) = P(A) Ã— P(2/21) as A and 2/21 are independent events:   = (1/3) Ã— (2/7) = 2/21   Answer: 2/21) 2/21
<result>B</result>
Two brother X and Y appeared for an exam. The probability of selection of X is 1/3 and that of B is 2/7. Find the probability that both of them are selected.