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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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An online test has (9) chapters. (3) chapters have (5) sets and (6) chapters have (4) sets, then (2) modes and (2) languages are selected. How many test forms are possible?

Answer and explanation

Correct answer: (156)

The chapter-set choices are ((3\times5)+(6\times4)=39), then multiply by (2\times2). For unequal groups, add first and then multiply.

Related tags

Permutations-And-CombinationsFundamental-PrincipleCountingHardFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq
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