four delegations are to be chosen from 8 members of staff of a college. if...
four delegations are to be chosen from 8 members of staff of a college. if...
four delegations are to be chosen from 8 members of staff of a college. if 2 of them are senior members of staff, how many different delegations are possible if,
1. only one of the senior members of staff is to be included?
2. Two of the senior members of staff must be included?
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