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Mariana [72]
3 years ago
15

A six-member committee is formed to plan a Christmas formal. The

Biology
1 answer:
tankabanditka [31]3 years ago
3 0

Total number of different committees = C(14,6) = N 

We have two cases where we have less than 2 teachers. 

case 1: 1 teacher (out of 5) 

Number of ways to choose 1 teacher = C(5,1) = 5 

Number of ways to choose the remaining members from students = C(9,5) 

Total number of ways to choose a committee with exactly 1 teacher = 5C(9,5) = N1  

case 2: no teacher 

Number of ways to choose 6 students = C(9,6) = N2 Probability to choose at least two teachers 

= (N-N1-N2)/N 

=109/143

I hope tmy answer helps you

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