Class 11

Permutation and Combination question bank (Maths)

Practice 1,566 free Class 11 Maths - Permutation and Combination questions with answers and step-by-step solutions.

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Q1.

In how many ways can $mn$ letters be posted in $n$ letter-boxes?

(A)
$(mn)^n$
(B)
$m^{mn}$
(C)
$n^{mn}$
(D)
None of these
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Q2.

In a train,five seats are vacant. In how many ways can three passengers sit?

(A)
$20$
(B)
$30$
(C)
$10$
(D)
$60$
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