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A student chooses one subject from 3 subjects and one game from 5 games. How many different selections are possible in total?

Answer and explanation

Correct answer: 15

By the multiplication principle, the subject can be chosen in 3 ways and the game in 5 ways, so the total number of selections is \(3 \times 5 = 15\). The answer 8 would result from adding the choices, but both selections are made together, so multiplication is required. In an exam, use the multiplication rule when independent choices are made successively.

Related tags

Permutations And CombinationsCounting PrincipleMultiplication RuleCombinationsMathematicsClass 11 Mcq

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