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How many different signals can be transm...

How many different signals can be transmitted by arranging 2 red, 3 yellow and 2 green flags on pole, if all the seven flags are used to transmit a signal?

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The correct Answer is:
210
Required number of signals`=(7!)/((2!) xx(3!) xx (2!))`.
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RS AGGARWAL-PERMUTATIONS-EXERCISE 8E
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  3. There are 3 blue balls, 4 red balls and 5 green balls. In how many way...

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  4. A child has three plastic toys bearing the digits 3, 3, 5 respectively...

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  5. How many different signals can be transmitted by arranging 2 red, 3 ye...

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  6. How many words can be formed by arranging the letters of the word 'AR...

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  7. How many words can be formed by arranging the letters of the word 'IN...

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  8. Find the number of arrangements of the letters of the word 'ALGEBRA' ...

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  9. How many words can be formed from the letters of the word 'SERIES', wh...

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  10. In how many ways can the letters of the word 'PARALLEL' be arranged so...

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  11. How many different words can be formed with the letters of the word 'C...

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  12. In how many ways can the letters of the word ASSASSINATION be arran...

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  13. (i) How many arrangements can be made by using all the letters of the ...

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  14. In how many ways can the letters of the word INTERMEDIATE be arranged ...

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  15. (i) Find the number of different words formed by using all the letter...

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  16. How many five-digit numbers can be formed with the digits 5, 4, 3, 5,...

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  17. How many numbers can be formed with the digits 2, 3, 4, 5, 4, 3, 2 so ...

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  18. How many 7-digit numbers can be formed by using the digits 1, 2, 0, 2...

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  19. How many 6-digit numbers can be formed by using the digits 4, 5, 0, 3,...

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  20. The letters of the word 'INDIA' are arranged as in a dictionary. What ...

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