At an electron, a voter may vote for any number of candidates not greater than the number to be elected. There are 10 candidates and 4 are to be elected. If a voter votes for at least one candidate, then the number of ways in which he can vote, is

Question

Dr. Abubacker · Accepted Answer

(b)
Total number of ways
$= \ ^{10}C_{1} + \ ^{10}C_{2} + \ ^{10}C_{3} + \ ^{10}C_{4}$
$= 10 + 45 + 120 + 210 = 385$

Q. At an electron, a voter may vote for any number of candidates not greater than the number to be elected. There are 10 candidates and 4 are to be elected. If a voter votes for at least one candidate, then the number of ways in which he can vote, is

Explanation

Reviewed by Dr. Abubacker

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