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Polynomial Expressions

The no .of wa...

Question

The no .of ways of selecting $4$ people from group of $6$ people is

15

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20

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90

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8

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Solution

The correct option is A $15$
The no .of ways of selecting $4$ people from group of $6$ people is given by $^{6} C_{4} \frac{6!}{4! 2!} = \frac{6 \times 5}{2} = 15$

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