Permutations Practice Test 2

Question : 24 of 30

Marks: +1, -0

In an examination there are three multiple choice questions and each question has 4 choices. Numberof ways in which a student can fail to get all answers correct, is:

Validate

Solution:

Each question can be answered in 4 ways and all questions can be answered correctly in only one way, so the required number of ways

= 4^3 - 1 = 63

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