A TEAM OF FOUR CHILDREN ARE TO BE CHOSEN FROM 3 GIRLS AND 6 BOYS...

Toán ĐỀ THI TOÁN QUỐC TẾ PMWC VÒNG CÁ NHÂN

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8. A team of four children are to be chosen from 3 girls and 6 boys. There must

be at least one girl in the team. How many different teams of 4 are possible?