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In a stage program one song is chosen from (6) songs and one dance from (3) dances. How many program pairs are possible?

Answer and explanation

Correct answer: (18) pairs

The direct answer is B: 18 pairs. A program pair requires two independent choices: one song and one dance. There are 6 choices for the song. For each chosen song, any of the 3 dances may be selected. By the fundamental principle of counting, multiply the choices: \(6\times3=18\). Option A, 9, adds the choices and does not count all combinations. Option B, 18, is correct because every song can be paired with every dance. Option C, 12, has no correct counting basis here. Option D, 6, counts only the song choices and ignores the dance choice. For example, song 1 can form three pairs, and the same is true for all six songs, giving \(3+3+3+3+3+3=18\). Memory cue: use addition for either/or choices, but multiplication when choices are made together.

Related tags

Permutations-Combinations Fundamental-Principle-Counting Class11Fundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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