In a group of 10 outstanding student in a school there are six boys and four girls three students are to be selected out of these at random for debate competition find probability that all of them are boys

CBSE Class 11-science Answered

Asked by sangitakavediya007 | 29 Sep, 2019, 04:10: PM

Expert Answer

Total no. of students=10

No. of boys=6 and no. of girls=4

No. of ways of selcting 3 student = ¹⁰C₃

No. of ways of selecting 3 boys=⁶C₃

Just do ¹⁰C₃ upon ⁶C₃

Answered by | 30 Sep, 2019, 01:06: PM

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