CBSE Class 11-Mathematics: Questions: Permutation Exercise 2
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Question 1:
Evaluate
(i)
(ii)
Question 2:
Is
Question 3:
Compute
Question 4:
Calculate if
Question 5:
Evaluate,
when
(i)
(ii)
Solution 1
We know that
So, solving the below questions based on that
(i)
(ii) First calculate the factorials
Then
Solution 2
We know that factorials are given by
So, solving the below questions based on that
So, it is clear that
Solution 3
Solution 4:
Cancelling On both the sides
Solving this
Solution 5:
When
(i)
(ii)