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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

If

{ }^{10} C_{{r}-1} > 2\left({ }^{10} C_{\mathrm{r}}\right)

then

r

is equal to

View answer and explanation

Correct option: C

8, 9, 10

Option C (8, 9, 10) is correct because these values of r satisfy the inequality

{}^{10} C_{{r}-1} > 2\left({}^{10} C_{\mathrm{r}}\right)

after simplification.

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