Question

1.
A teacher wants to select the class monitor
in a class of 30 boys and 20 girls. In how
many ways can the monitor be selected if the
monitor must be a girl?​

Answer 1

A class monitor can only be one in a class. We are given a class of 30 boys and 20 girls to select a monitor from. But the condition here is that the monitor should only be a girl. So, if we want the monitor to be a girl, we must neglect the 30 boys and select the monitor from 20 girls only. This means that there are 20 ways a monitor that is a girl can be selected.

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