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In a class there are 25 boys and 10 girl...

In a class there are 25 boys and 10 girls. The teacher wants to select 1 boy and 1 girl to represent the class in-a function. In how many ways can the teacher make the selection

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A N EXCEL PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTION BANK
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  3. In a class there are 25 boys and 10 girls. The teacher wants to select...

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  4. Given that p(n,r)=(n!)/((n-r)!) What are the values of P(5, r) and P(6...

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  5. If 5 xx 4Pr = 6 xx 5P(r-1) find 'r'.

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  6. Given that P(n, r)=n(n-1)(n-2)….to r factors What are the values of P(...

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  7. Given that P(n, r)=n(n-1)(n-2)….to r factors If P(n, 4) = 20 P(n, 2),...

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  8. Prove that ^9p5+5^9p4=(10!)/(5!)

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  9. If ^9p5+5^9p4=^10pr.prove that r=5

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  10. Prove that ""^(2n+1)P(n-1)=((2n+1)!)/((n+2)!) and ""^(2n-1)Pn=((2n-1)...

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  11. if ^(2n+1)p(n-1):^(2n-1)pn=3:5, prove that n = 4

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  15. Consider the word ‘LOGARITHMS' How many 4 letter words, with or withou...

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  16. Consider the word ‘LOGARITHMS' How many 4 letter words, with or withou...

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