Mathematics, 30.10.2021 22:20, ToxicMonkey

Có 2 chuồng gà: chuồng I có 8 con mái, 4 con trống, chuồng II có 9 con mái, 3 con trống. a. Bắt ngẫu nhiên 3 con từ chuồng I. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?
b. Bắt ngẫu nhiên 3 con từ chuồng II. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?
c. Bắt ngẫu nhiên 3 con từ mỗi chuồng. Hỏi trung bình có bao nhiêu con gà mái được bắt ra?

Answers: 1

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Có 2 chuồng gà: chuồng I có 8 con mái, 4 con trống, chuồng II có 9 con mái, 3 con trống. a. Bắt ng...