Permutations and Combinations-Combination as Selection (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Math): Questions 1 - 2 of 2

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Question number: 1

» Permutations and Combinations » Combination as Selection

Appeared in Year: 2014

MCQ▾

Question

Let x and y be two 2-digit numbers such that y is obtained by reversing the digits of x. Suppose they also satisfy for some positive integer m. The value of is

Choices

Choice (4) Response

a.

112

b.

144

c.

154

d.

88

Question number: 2

» Permutations and Combinations » Combination as Selection

Appeared in Year: 2014

MCQ▾

Question

The number of all 3-digit numbers abc (in base 10) for which,

is

Choices

Choice (4) Response

a.

6

b.

14

c.

10

d.

18

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