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7. Permutations and Combinations
Home · Class 11 · Maths · Ref. Book · 7. Permutations and Combinations
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Q6 of 31 Page 7

If , then find x.

Consider








⇒ x = 81


More from this chapter

All 31 →
4

How many 5-digits numbers can be formed using digits 0-9 if repetition is allowed?

5

The English alphabet has 5 vowels and 21 consonants. How many words with two different vowels and 2 different consonants can be formed from the alphabet?

7

There are 10 points on a circle. By joining them how many chords can be drawn?

8

Ten buses are plying between two places A and B. In how many ways a person can travel from A to B and come back?

Questions · 31
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 31
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