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Ten persons are arranged in a row. The n...

Ten persons are arranged in a row. The number of ways of selecting four persons so that no two persons sitting next to each other are selected is

A

124

B

136

C

126

D

none of these

Text Solution

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The correct Answer is:
C
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ARIHANT SSC-PERMUTATIONS & COMBINATIONS -EXERCISE (LEVEL-2)
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  2. Find the number of natural numbers which are less than 2xx10^8 and whi...

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  3. Ten persons are arranged in a row. The number of ways of selecting fou...

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  4. n bit strings are made by filling the digits 0 or 1.The number of stri...

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  5. A question paper has two parts-Part A and Part B. Part A contains 5 qu...

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  6. How many different vehicle licence plates can be made if the licences ...

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  7. How many 3-digit numbers can be formed from the digits 1,2,3,4 and 5 a...

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  8. A tea party is arranged for 16 people along two sides of a large table...

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  9. By selling an article for 285 a man loses 5%. For how much should he s...

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  10. Priyanka has 11 different toys and supriya has 8 different roys ...

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  11. The sum of the numbers of the n^(th) term of the series (1) +(1...

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  12. Two packs of 52 playing crds are shuffled together . The number of way...

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  13. In how many ways we can select four cards of different suits and diffe...

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  14. How many 5 digit numbers can be formed having the digits 0 three times...

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  15. How many different four digit numbers can be formed with the digits 1,...

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  16. How many different four digit numbers can be formed using digits 1, 2,...

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  17. The number of different seven digit numbers that can be written using ...

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  18. In how many ways can 8 distinct things be divided among three people s...

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  19. There are 6 numbered chairs placed around a circular table. 3 boys and...

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  20. In how how many ways one black and one white rook can be placed on a c...

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