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Ex 6.1,2 - Chapter 6 Class 11 Permutations and Combinations
Last updated at August 17, 2026 by Teachoo
Fundamental principal of counting
Chapter 6 Class 11 Permutations and Combinations
Concept wise
- Factorial
-
Fundamental principal of counting
- Permutation formula
- Permutation- non repeating
- Permutation- repeating
- Combination formula
- Combination
- Both Permuation and combination
Transcript
Ex 6.1, 2 How many 3 digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 if the digits can be repeated? Let the 3 digit even number be Only 3 numbers are possible at units place (2 , 4 & 6) as we need even number. But at tens & hundreds place all 6 are possible Number of 3 digit even numbers = 3 × 6 × 6 = 108 Rough 158 is even as 8 is even 296 is even as 6 is even
