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How many five-digit telephone numbers are there, the sum of whose digits is even ?

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PATHFINDER-PERMUTATION AND COMBINATIONS-QUESTION BANK
  1. Find the number of ways in which the letters of the word 'INTERMEDIATE...

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  2. How many seven-digit numbers are there, the sum of whose digit is even...

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  3. How many five-digit telephone numbers are there, the sum of whose digi...

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  4. How many 4 digit numbers can be formed from the digits 1, 1, 2, 2, 3, ...

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  5. Find the number of students to be selected at a time from a group of 1...

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  6. Find the sum of the five digit numbers formed by the digits 2, 3, 4, 5...

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  7. A boat has a crew of 8 men of which 2 can row only on one side and onl...

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  8. Show that the total number of selection that can be made out of the le...

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  9. A committee of 5 is to be formed from 9 women and 8 men. if the commit...

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  10. A 5-digit number is divisible by 3 and it is formed by using 0, 1, 2, ...

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  11. Find the number of (i) Combination (ii) Permutation of the letters of...

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  12. Find the number of ways in which a selection of four letters can be ma...

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  13. Find the word in 50th position in the dictionary when the letters of t...

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  14. How many ways n distinct objects be placed in 2 different boxes so tha...

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  15. How many ways the three angular points of a regular decagon can be sel...

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  16. Find the number of words that can be made by writing down the letters ...

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  17. In an election the number of contestants is one more than the number o...

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  18. Find the number of combinations and Permutations of 4 letters taken fr...

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  19. In how many ways a committee of 6 can be formed from a group of 10 doc...

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  20. Car licenses of a certain place consist of 3 letters followed by 3 dig...

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