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7. Permutations and Combinations
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Q10 of 30 Page 7

If find x.


=

Therefore x = 64.

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8
Is 3! + 4! = 7! ?

9
Compute 

11
Evaluate when (i) n = 6, r = 2 (ii) n = 9, r = 5

12
How many 3 digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

Questions · 30
7. Permutations and Combinations
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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