Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 25

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11th CBSE

IMPORTANT

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A triangle $A B C$ is given. If $3$ points are chosen on each of the sides $A B, B C,$ and $C A,$ then the number of triangles formed by these points, is

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Important Questions on Permutations and Combinations

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11th CBSE

IMPORTANT

Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 26

If

{}^{n}P_{4} =^{n} P_{5}

, then

n = ?

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11th CBSE

IMPORTANT

Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 27

{}^{n}C_{r - 2} + 2 \times^{n} C_{r - 3} +^{n} C_{r - 4} = ?

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Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 28

The letters of the word

S T I N C K Y

are jumbled and rearranged in all possible ways. The words thus obtained are arranged in alphabetical order. Which of the following word will have the rank

1441

?

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11th CBSE

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Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 29

There are

16

points in a plane out of which

10

are collinear and no three of the other

6

are collinear. Find the number of triangles that can be formed

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11th CBSE

IMPORTANT

Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>OBJECTIVE TYPE QUESTIONS>Q 30

The number of sides of a regular polygon which has

20

diagonals is