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IF ""^((m+n))P(2) =90 ,""^((m-n))P(2) ...

IF ` ""^((m+n))P_(2) =90 ,""^((m-n))P_(2) =30 ` then (m,n)=

A

(10,3)

B

(9,2)

C

(8,2)

D

(7,3)

Text Solution

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1A (PERMUTATIONS )
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