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Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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A gift pack has (4) box choices, (6) ribbon choices, (5) card choices, and (7) sticker choices. If one special box and one special ribbon are chosen together, sticker choices reduce from (7) to (3). How many packs are possible?

Answer and explanation

Correct answer: (3340)

Without the condition, total choices are (4\times6\times5\times7=3360), and (4\times5=20) choices are overcounted for the special pair. Hence (3340) is correct.

Related tags

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