Class 11 Math Chapter 7 MCQ Question Answer NCERT Solution

NCERT Class 11 Math Permutations and Combinations Chapter 7 MCQ Question Answer for Preparation of Exams. Here we Provide Class 11 Math Question Answer, Important Questions, MCQ for Various State Boards Students like CBSE, Haryana, uttar pradesh, mp and other state students.

Also Read : – Class 11 Math NCERT Solution

NCERT Class 11 Math Chapter 7 Permutations and Combinations MCQ Question Answer Solution.

Permutations and Combinations Class 11 Math Chapter 7 MCQ Question Answer


1. The value of x for which 1/7! + 1/8! = 1/x is :
(A) 4280
(B) 4480
(C) 5020
(D) None of the above

Answer

Ans. (B) 4480


2. If nC5 = nC7 ,  then the value of n is
(A) 8
(B) 10
(C) 12
(D) 35

Answer

Ans. (C) 12


3. If nC8 = nC9 , then the value of nC17 is :
(A) 0
(B) 1
(C) 1224
(D) None of the above

Answer

Ans. (B) 1


4. Value of 12C3 is:
(A) 2112
(B) 220
(C) 36
(D) None of the above.

Answer

Ans. (B) 220


5. The number of permutation of the letters of the word ‘ALLAHABAD’ are :
(A) 9!
(B) 9! /2!
(C) 9! /4! 2!
(D) 9! /2! 2!

Answer

Ans. (C) 9! /4! 2!


6. How many three digit numbers can be formed from the digits 1, 2, 3, 4  when repetition of digits is not allowed?
(A) 8
(B) 16
(C) 24
(D) 12

Answer

Ans. (C) 24


 

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