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The number of ways in which any four let...

The number of ways in which any four letters cab be selected from the word 'CORGOO' is

A

15

B

11

C

7

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-PERMUTATIONS AND COMBINATIONS-Exercise
  1. The number of ways of choosing a committee of 4 women and 5 men from 1...

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  2. A set contains 2n+1 elements. The number of subsets of this set conta...

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  3. The number of ways in which any four letters cab be selected from the ...

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  4. A 5 digit number divisible by 3 is t formed sing the digits 0,1,2,3,4 ...

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  5. If 7 points out of 12 are in the same straight line, then the number o...

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  6. If a denotes the number of permutations of (x+2) things taken all at a...

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  7. There are number of seats and m number of people have to be seated, th...

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  8. There are 5 letters and 5 directed envelopes. The number of ways in wh...

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  9. Find the number of ways of selecting 10 balls out o fan unlimited n...

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  10. The total number of different combinations of letters which can be mad...

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  11. The total number of six-digit natural numbers that can be made with...

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  12. The number of numbers of 7 digits whose sum of digits is even, is

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  13. All possible four-digit numbers have formed using the digits 0, 1, 2, ...

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  14. If the permutations of a, b, c, d, e taken all together be written dow...

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  15. Determine the number of natural numbers smaller than 10^4, in the deci...

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  16. If eight persons are to address a meeting, then the number of ways in ...

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  17. Find the number of proper factors of the number 38808. also, find sum ...

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  18. All possible products are formed from the numbers 1, 2, 3, 4, ..., 200...

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  19. In an examinations there are three multiple choice questions and each ...

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  20. If all the words formed with the letters of the word 'RANDOM' arranged...

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