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If "^9P5+5*^9P4=^(10)Pr , find the value...

If `"^9P_5+5*^9P_4=^(10)P_r ,` find the value of `r`.

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CENGAGE PUBLICATION-PERMUTATIONS AND COMBINATIONS-All Questions
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  2. A team of four students is to be selected from a total of 12 studen...

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  3. If "^9P5+5*^9P4=^(10)Pr , find the value of r.

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  5. Seven athletes are participating in a race. In how many ways can the ...

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  6. Two teams are to play a series of five matches between them. A matc...

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  7. Prove that if rlt=slt=n ,t h e n^n Ps is divisible by ^n Pr .

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  8. The number of even divisor of the number N=12600=2^3 3^2 5^2 7 is a. ...

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  9. Find the number of zeros at the end of 130!.

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  10. A candidate is required to answer 6 out of 10 questions, which are ...

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  11. Find the exponent of 3 in 100!

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  12. If "^10 Pr=5040 , find the value of r.

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  13. Statement 1: Number of ways of selecting 10 objects from 42 objects ...

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  14. Find the number of zeros at the end in product 5^6 .6^7 .7^8 .8^9 .9^(...

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  15. Statement 1: Number of ways in which Indian team (11 players) can ba...

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  16. In how any different ways can a set A of 3n elements be partitioned in...

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  17. Statement 1: When number of ways of arranging 21 objects of which r...

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  18. lf a ,b , in {1,2,3,4,5,6,}, find the number of ways aa n db can be ...

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