(A) 3794/8854
(B) 8514/9890
(C) 2178/4320
(D) 4158/9880
Correct Option is: D
Let , S – sample space E – event of selecting 1 girl and 2 boys.
Then, n(S) = Number ways of selecting 3 students out of 40
= 40C3
= 9880
n(E) = 18C1 *22C2
= 18*231
= 4158
P(E) = n(E)/n(s) = 4158/9880