A COMMITTEE IS TO BE CHOSEN FROM 4 GIRLS AND 5 BOYS AND IT MUST CO...

11. - ĐỀ THI OLYMPIC TOÁN TMO VÒNG CÁ NHÂN
Toán ĐỀ THI OLYMPIC TOÁN TMO VÒNG CÁ NHÂN
11. A committee is to be chosen from 4 girls and 5 boys and it must contain at least 2 girls. How many different committees can be formed? Answer : ways