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In how many ways a team of 3 boys and 3 girls can be formed from 10 boys and 5 girls, if two particular B1 and B2 are not in team together:(1) 1115(2) 1120(3) 1280(4) 1220 |
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Answer» Correct option is (2) 1120 Total no. of way to select 3 boys and 3 girls = 10C3 - 5C3 = 1200 When particular boys B1 and B2 both are in team = 8C1.5C3 = 80 So required number of ways = 1200 - 80 = 1120 |
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