A teacher has trained 7 boys and 3 girls and wants to select one of them for the inter-school solo dance competition. In how many ways can the teacher make this selection?
10

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Solution

The correct option is A 10
In the first choice, the teacher can select a boy among 7 boys in 7 ways.
In the second choice, the teacher can select a girl among 3 girl in 3 ways.
Hence, the teacher can select a solo dancer who is a boy or a girl in 10 different ways (7 boys + 3 girls).

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A teacher has trained 7 boys and 3 girls and wants to select one of them for the inter-school solo dance competition. In how many ways can the teacher make this selection?10

The correct option is A 10In the first choice, the teacher can select a boy among 7 boys in 7 ways.​ In the second choice, the teacher can select a girl among 3 girl in 3 ways.​ Hence, the teacher can select a solo dancer who is a boy or a girl in ​10 different ways (7 boys + 3 girls).

A teacher has trained 7 boys and 3 girls and wants to select one of them for the inter-school solo dance competition. In how many ways can the teacher make this selection?
10

The correct option is A 10
In the first choice, the teacher can select a boy among 7 boys in 7 ways.
In the second choice, the teacher can select a girl among 3 girl in 3 ways.
Hence, the teacher can select a solo dancer who is a boy or a girl in 10 different ways (7 boys + 3 girls).