Math Problem Statement
Dua puluh bola bernomor 1 sampai dengan 20 dikocok dalam satu kotak, kemudian diambil dua bola berturut turut tanpa pengembalian. Bila x¹ dan x² adalah nomor yang tertulis pada bola terambil pertama dan kedua maka probabilitas x¹ + x² = 13 sama dengan ?
Solution
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Math Problem Analysis
Mathematical Concepts
Probability
Combinatorics
Formulas
P(event) = favorable outcomes / total outcomes
Theorems
Basic probability principles
Combinatorial counting
Suitable Grade Level
Grades 9-11
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