Math Problem Statement
サッカー部10人、水泳部6人、柔道部7人からランダムで3人を選んだ時、3人が同じ部活になる確率は何%か。小数点以下第一位を四捨五入して整数のみで答えよ。
Solution
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Math Problem Analysis
Mathematical Concepts
Combinatorics
Probability
Formulas
Combination formula: C(n, k) = n! / [k!(n-k)!]
Probability formula: P(event) = favorable outcomes / total outcomes
Theorems
Combination theorem
Basic probability rules
Suitable Grade Level
Grades 10-12
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