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A student makes a (6)-day study plan. Each day he studies one subject from Mathematics, Physics, or Chemistry, but he never studies the same subject on consecutive days. How many plans are possible?

Answer and explanation

Correct answer: (3\cdot2^5)

The first day has (3) choices and each later day has (2) choices different from the previous day. With consecutive restrictions, choices reduce after the first position.

Related tags

PermutationsCombinationsCounting PrincipleClass 11ExpertFundamental Principle Of CountingPermutations And CombinationsMathematics

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