Permutations and Combinations-Fundamental Principle of Counting (BITSAT Mathematics): Questions 1 - 3 of 3

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Question number: 1

» Permutations and Combinations » Fundamental Principle of Counting

MCQ▾

Question

There are n white and n black balls. The number of ways in which we can arrange these balls in a row so that neighboring balls are of different colors is –

Choices

Choice (4) Response

a.

2(n!)2

b.

2n!(n!)2

c.

n!

d.

2n!

Question number: 2

» Permutations and Combinations » Fundamental Principle of Counting

MCQ▾

Question

There are m copies of each n different books in library. The number of ways in which one or more than one book can be selected as –

Choices

Choice (4) Response

a.

mn+1

b.

(m+1)n1

c.

(n+1)nm

d.

m

Question number: 3

» Permutations and Combinations » Fundamental Principle of Counting

MCQ▾

Question

The number of ways in which one or more balls can be selected out of 10 white, 9 green and 7 blue balls, is –

Choices

Choice (4) Response

a.

881

b.

892

c.

879

d.

891

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