In how many ways can a selection of 6 out of 4 teachers and B students be done so as
to include at least two teachers?
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Correct answer is option 'B'. Can you explain this answer?
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Muskan Jain answered Aug 08, 2020
Number of ways to select 6 out of 4 teachers and 8 students such there are atleast 2 teachers
4C2 × 8C4 + 4C3 × 8C3 + 4C4 × 8C2
= 420 + 224 + 28
= 672
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