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There persons enter into a conference h...

There persons enter into a conference hall in which there are 10 seats. In how many ways they can take their seats ?

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(i) A person went to a restaurant for dinner. In the menu card, the person saw 10 Indian and 7 Chinese food items. In how many was the person can select either an Indian or a Chinese food? (ii) There are 3 typesof toy car and 2 types of toy train available in a shop. Find the number of ways a baby can buy a toy car and a toy train? (iii) How many of two-digit numbers can be formed using 1,2,3,4,5 without repetiton of digits? (iv) There persons enter in to a conference hall in which there are 10 seats, In how many ways they can take their place? (v) In how many ways 5 persons can be seated in a row?

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PREMIERS PUBLISHERS-COMBINATORICS AND MATHEMATICAL INDUCTION-EXERCISE 4.1
  1. There are 3 types of toy car and 2 types of toy train are available ...

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  2. How many two - digit numbers can be formed using 1,2,3,4,5 with...

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  3. There persons enter into a conference hall in which there are 10 sea...

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  4. In how many ways 5 persons can be seated in a row ?

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  5. A mobile has a pass code of distinct digits. What is the maximum nu...

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  6. Given four flags of different colours, how many different signals can...

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  7. Four children are running a race . (i) In how many ways can the...

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  8. Four children are running a race . (i) In how many ways can the...

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  9. Count the number of three - digit numbers which can be formed from t...

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  10. Count the number of three - digit numbers which can be formed from t...

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  11. How many three - digit numbers are there with 3 in the unit place ? ...

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  12. How many three - digit numbers are there with 3 in the unit place ? ...

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  13. How many numbers are three between 100 and 500 with the digits 0,1...

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  14. How many numbers are three between 100 and 500 with the digits 0,1...

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  15. How many three-digit odd numbers can be formed by using the digits 0...

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  16. How many three-digit odd numbers can be formed by using the digits 0...

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  17. Count the numbers between 999 and 10,000 subject to the condition that...

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  18. Count the numbers between 999 and 10,000 subject to the condition that...

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  19. Count the numbers between 999 and 10,000 subject to the condition that...

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  20. How many three- digit numbers, which are divisible by 5, can be for...

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