KeKe Z.
asked • 11/01/19Ap Stats Probability
The teacher had seven students lined up to ask about homework. The class had 20 males and 17 females. What is the probability that all 7 students who lined up were male? Please leave in fraction form.
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1 Expert Answer
William W. answered • 11/01/19
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The probability that the first person in line is a male is 20/37
The probability that the second person in line is a male is 19/36
The probability that the third person in line is a male is 18/35
The probability that the fourth person in line is a male is 17/34
The probability that the fifth person in line is a male is 16/33
The probability that the sixth person in line is a male is 15/32
The probability that the seventh person in line is a male is 14/31
The probability that all of this happened is (20/37)(19/36)(18/35)(17/34)(16/33)(15/32)(14/31) = 1615/214489
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KeKe Z.
Please to into consideration that factorial had not been taught yet...TY11/01/19