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?*

Answer 1

Probability= cases that fulfill/all possible cases

In how many ways can 1 gir and 2 boys be selected?

$\begin{gathered} 15C2+10C1 \\ 105+10 \\ 115 \end{gathered}$

now the possible cases is that you select random 3 students from the class

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