Mathematics, 09.11.2020 16:40 QueenKy6050
In a group of 20 boys and 14 girls, three people are chosen at random. What is the probability that 1 girl and 2 boys are selected
Answers: 2
![\dfrac{14\times\dfrac{20!}{2!18!}}{\dfrac{34!}{3!31!}}\ \ \ [^nC_r=\dfrac{n!}{r!(n-r)!}]\\\\=\dfrac{14\times\dfrac{20\times19}{2}}{\dfrac{34\times33\times32\times31!}{3\times2\tims3!}}\\\\=\dfrac{665}{1496}](/tpl/images/0880/0948/a29af.png)
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In a group of 20 boys and 14 girls, three people are chosen at random. What is the probability that...
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