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23. From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 women are there on the committee. How can it be done?
23. From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 women are there on the committee. How can it be done?
===Answer===
The combination can be
2 men 3 women = COMBIN(7,2)*COMBIN(6,3)
1 men 4 women = COMBIN(7,1)*COMBIN(6,4)
0 men 5 women = COMBIN(7,0)*COMBIN(6,5)
Total = COMBIN(7,2)*COMBIN(6,3)+COMBIN(7,1)*COMBIN(6,4)+COMBIN(7,0)*COMBIN(6,5) = 531
24. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
24. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?