EASY
JEE Main/Advance
IMPORTANT
Earn 100

Find the number of 6 digit numbers that ends with 21 (eg. 537621), without repetition of digits.

Important Questions on Permutation and Combination

EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 9
The digits from 0 to 9 are written on slips of paper and placed in a box. Four of the slips are drawn at random and placed in the order. How many outcomes are possible?
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 10
 Find the number of natural numbers from 1 to 1000 having none of their digits repeated.
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 11
A number lock has 4 dials, each dial has the digits 0, 1, 2, ......., 9. What is the maximum unsuccessful attempts to open the lock?
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 12
In how many ways we can select a committee of 6 persons from 6 boys and 3 girls, if at least two boys and at least two girls must be there in the committee?
MEDIUM
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 13
In how many ways 11 players can be selected from 15 players, if only 6 of these players can bowl and the 11 players must include at least 4 bowlers?
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 14
A committee of 6 is to be chosen from 10 persons with the condition that if a particular person 'A' is chosen, then another particular person B must be chosen.
EASY
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 15
In how many ways we can select 5 cards from a deck of 52 cards, if each selection must include at least one king.
HARD
JEE Main/Advance
IMPORTANT
Alpha Question Bank for Engineering: Mathematics>Chapter 8 - Permutation and Combination>Exercise-1>Q 16
How many four digit natural numbers not exceeding the number 4321 can be formed using the digits 1,2,3,4 if repetition is allowed?