in a classroom theres 15 boys and 25 girls. what is probability 3 students get chosen...

Question

Question

in a classroom theres 15 boys and 25 girls. what is probability 3 students get chosen and are girls?

Answer 1

Answer #1

3 girls selected from 25 girls by ²⁵C₃ ways .

Total number of ways to select 3 students from 40 students = ⁴⁰C₃

In general nCr = n! / [ (n-r)! * r! ]

Therefore,

P(3 students that are girls) = ²⁵C₃ / ⁴⁰C₃

= 0.2328

Answer 2

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