Quant. - permutation& combi
This query is : Resolved
09 October 2013
a person has 8 friends. the number of ways in which he may invite one or more of them to a dinner ?
1.250
2.255
3.200
Ganeshbabu K
(Expert)
10 October 2013
Answer is 255
.
.
.
=8C1+8C2+8C3+8C3+8C4+8C5+8C6+8C7+8C8
.
.
.
=8C1+8C2+8C3+8C3+8C4+8C5+8C6+8C7+8C8
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