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The sum of the digits in unit place of a...

The sum of the digits in unit place of all the numbers formed with the help of 3, 4, 5 and 6 taken all at a time is

A

432

B

108

C

36

D

18

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Chapter Test
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  11. The number of ways in which 6 men and 5 women can dine at a round tabl...

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  12. A students is to answer 10 out of 13 questions in an examminations suc...

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  13. Write the number of all possible words that can be formed using the ...

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  14. In a group of boys, two boys are brothers and six more boys are pres...

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  15. Nishi has 5 coins, each of the different denomination. Find the number...

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  16. Write the number of ways in which 5 boys and 3 girls can be seated in ...

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  17. How many different nine-digit numbers can be formed from the digits of...

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  18. The number of 4 digit even numbers that can be formed using 0, 1, 2, 3...

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  19. The number of ways in which n ties can be selected from a rack display...

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  20. There are n-points (ngt2) in each to two parallel lines. Every point o...

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