Question

There are 15 boys and 10 girls in a class. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?
A.140
B.12
C.2146
D.74

Answer 1

The boy who will b selected is very lucky

Answer 2

$probability\:=\frac{\: no \: of \: fav \: outcomes}{totlno \: of \: outomes}$
probability for 1 girl is
$= \frac{1}{10}$
and probability of 2 boys is
$\frac{2}{15}$
total probability is
$= \frac{1}{10} + \frac{2}{15} = \frac{3 + 4}{30} = \frac{7}{30}$