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 either a girl or a boy?​

Answer 1

Answer:

The teacher wants to select a class monitor from these boys and girls. A boy can be selected in 30 ways and a girl can be selected in 20 ways. ∴ By using the fundamental principle of addition, the number of ways either a boy or a girl is selected as a class monitor = 30 + 20 = 50.