Question
In a class there are 20 boys and 25 girls. In how many ways can a pair of a boy and a girl be selected?(1) 400(2) 500(3) 600(4) 20
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We are asked to find the number of pairs that can be formed, each containing 1 boy and 1 girl. Show more…
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In a class there are 20 boys and 25 girls. In how many ways can a pair of a boy and a girl be selected? (1) 400 (2) 500 (3) 600 (4) 20
In a class there are 20 boys and 15 girls. In how many ways can 2 boys and 2 girls be selected? (1) ${ }^{35} \mathrm{C}$ (2) ${ }^{35} \mathrm{C}$, (3) ${ }^{20} \mathrm{C}_{2} \times{ }^{15} \mathrm{C}_{2}$ (4) $20 \times 15$
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