There are 22 boys and 15 girls in a class. A teacher wants to select one boy and one girl. In how many ways can this be done?
i)15. ii)22. iii)37. iv)330
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3
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Step-by-step explanation:
Answered by
1
Step-by-step explanation:
22C1 × 15C1
=22!/21! × 15!/14!
=22×21!/21! × 15×14!/14!
=22×15
=330
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