Combinations (C(n,r)): JEE Questions & Solutions
8 previous-year JEE Mathematics questions on Combinations (C(n,r)), each with a worked step-by-step solution.
Previous-year questions
- 01
From all the English alphabets, five letters are chosen and are arranged in alphabetical order. The total number of ways, in which the…
MCQEasyJEE 2025 - 02
Group A consists of 7 boys and 3 girls, while group B consists of 6 boys and 5 girls. The number of ways, 4 boys and 4 girls can be invited…
MCQMediumJEE 2025 - 03
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MCQMediumJEE 2024 - 04
If ^n+1Cr+1: ^nCr: ^n-1Cr-1 = 55: 35: 21, then 2n + 5r is equal to:
MCQMediumJEE 2024 - 05
Suppose Anil's mother wants to give 5 whole fruits to Anil from a basket of 7 red apples, 5 white apples, and 8 oranges. If in the selected…
NVAMediumJEE 2023 - 06
Number of 4-digit numbers (the repetition of digits is allowed) which are made using the digits 1, 2, 3, and 5 and are divisible by 15 is…
NVAMediumJEE 2023 - 07
If ^2nC3^nC3 = 101, then the ratio (n^2 + 3n): (n^2 - 3n + 4) is:
MCQEasyJEE 2023 - 08
Let the number of elements in sets A and B be five and two respectively. Then the number of subsets of A B each having at least 3 and at…
MCQEasyJEE 2023
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