Permutations and Combinations-Fundamental Principle of Counting (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Math): Questions 1 - 1 of 1

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Question number: 1

» Permutations and Combinations » Fundamental Principle of Counting

Appeared in Year: 2012

MCQ▾

Question

Three children, each accompanied by a guardian, seek admission in a school. The principal wants to interview all 6 persons one after the other subject to the condition that no child is interviewed before its guardian. In how many ways can this be done?

Choices

Choice (4) Response

a.

180

b.

90

c.

60

d.

120

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