Permutations and Combinations-Simple Applications (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Math): Questions 1 - 3 of 3

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Question number: 1

» Permutations and Combinations » Simple Applications

Appeared in Year: 2010

MCQ▾

Question

Three vertices are chosen randomly from the seven vertices of a regular 7-sided polygon. The probability that they form the vertices of an isosceles triangle is –

Choices

Choice (4) Response

a.

13

b.

37

c.

17

d.

35

Question number: 2

» Permutations and Combinations » Simple Applications

Appeared in Year: 2010

MCQ▾

Question

The number of rectangles that can be obtained by joining four of the twelve vertices of a 12-sided regular polygon is –

Choices

Choice (4) Response

a.

66

b.

15

c.

24

d.

30

Question number: 3

» Permutations and Combinations » Simple Applications

Appeared in Year: 2014

MCQ▾

Question

Let X be a set of 5 elements. The numbers d of ordered pairs (A,B) of subsets of X such that AϕBϕ,AB=ϕ, satisfies:

Choices

Choice (4) Response

a.

151d200

b.

101d150

c.

201d

d.

50d100

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