EASY
11th CBSE
IMPORTANT
Earn 100

The number of sides of a regular polygon which has 20 diagonals is

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Important Questions on Permutations and Combinations

EASY
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 1
There are 3 different rings which are to be worn on 4 fingers with at most one in each finger. In how many ways they can be worn? 
EASY
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 2
In how many ways can the word PENCIL be arranged so that N is next to E? 
MEDIUM
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 3

Find n, if 5 P(4,n)=6 P(5,n-1).

EASY
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 4

In how many ways 4 boys and 3 girls can be seated in a row so that boys and girls can be seated alternately.

EASY
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 4

In how many ways 4 boys and 3 girls can be seated in a row so that girls always sit together?

EASY
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 5
How many numbers greater than 20,000 can be formed by using the digits 0, 1, 2, 3, 4 if no digit being repeated in any number? 
MEDIUM
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 6
How many different words can be formed from the letters of the word ORDINATE, so that the vowels occupy odd places? 
HARD
11th CBSE
IMPORTANT
Golden MATHEMATICS CLASS 11>Chapter 7 - Permutations and Combinations>SELF EVALUATION TEST>Q 7
Out of 5 men and 2 women a committee of 3 persons is to be formed so that at least one woman is to be included. How many ways committee can be formed?