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`        we wish to select 6 persons of 8,but if the person A is selected then B must be chosen. in how many ways can the selection be made?(plz explain)`
7 years ago

147 Points
```										Dear ajinkya
case 1  :   A and B is not included
then number of ways = 6C6 = 1

case 2 : B is selected A is not selected
number of ways  = 1* 6C5  = 6

case 3:  A and B both are selected
number of ways = 1*1* 6C4 = 15

so total ways  = 1+6+15 =22
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```
7 years ago
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