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A committee of 4 has to be chosen from 10 boys and 8 girls. In how many ways can this be done if girls are in a majority.

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10boys 8girls Number of selections
0 4 10C0 x 8C4 x 10C1 x 8C3
1 3 1 x 70 + 10 x 56 = 70 + 560 = 630 ways

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