Math miscellaneousHard

Question

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

Options

A.5040
B.6210
C.385
D.1110

Solution

10C1 + 10C2 + 10C3 + 10C4
= 10 + 45 + 120 + 210 = 385

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