A class has 10 boys and 5 girls. Three students are selected at random one after the other. Find the probability that i) First two are boys and third is girl. ii) First and third of samme sex and second is of opposite sex.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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A class has 10 boys and 5 girls. Three students are selected at random
one after the other. Find the probability that
i)
First two are boys and third is girl.
ii)
First and third of same sex and second is of opposite sex.
Transcribed Image Text:A class has 10 boys and 5 girls. Three students are selected at random one after the other. Find the probability that i) First two are boys and third is girl. ii) First and third of same sex and second is of opposite sex.
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