JEE Main Questions
Permutations and Combinations
If n1 and n2 are five-digit numbers, find the total number of ways of forming n1 and n2 so that these numbers can be added without carrying at any stage.
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
How many 4-letter code can be formed using the first 10 letters of the English alphabet, if no letter can be repeated?
are four-digit numbers, find the total number of ways of forming n1andn2
so that n2
can be subtracted from n1
without borrowing at any stage.
Find the number of ways in which we can choose 3 squares on a chess board such that one of the squares has its two sides common to other two squares.
In how many ways can 5 girls and 3 boys be seated in a row so that no two boys are together?
How many numbers lying between 100 and 1000 can be formed with the digits 0, 1, 2, 3, 4, 5, if the repetition of the digits is not allowed?
The number less than 1000 that can be formed using the digits 0, 1, 2, 3, 4, 5 when repetition is not allowed is equal to
b. 131 c. 156 d. 155
Find the total number of divisors of f(9)˙
Find the number of different signals that can be generated by arranging at least 2 flags in order (one below the other) on a vertical staff, if five different flags are available.