Number of ways in which a team of 13 can be selected from 25, always including 3 of them and excluding 4 of them is
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19 C 11
Step-by-step explanation:
Total No Persons available for selection= 25
We have to exclude 4 always so =25-4= 21 left
We have to Include 2 always = 21 - 2=19 left
It means we have to select from 19 people to form a team of 11 people as two persons are always included.
N=19 R=11
Total No of ways will be given by nCr
19C11 ways.
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