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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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In a journey from (P) to (Q), exactly one intermediate hub must be chosen. Via (H_1), there are (3) and (4) route choices, while via (H_2), there are (5) and (2) route choices. How many journeys are possible?

Answer and explanation

Correct answer: (22)

There are two separate route cases, so (3\times4+5\times2=22). Use addition for either-or cases and multiplication within stages.

Related tags

Permutations-And-CombinationsFundamental-PrincipleCountingHardFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq
सुधार सुझाएँ / Earn

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