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If m+ np2 = 90 and m-np2 = 30 , then (m,...

If `m+ np_2 = 90 and m-np_2 = 30` , then (m,n) is given by

A

(7,3)

B

(16,8)

C

(9,2)

D

(8,2)

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The correct Answer is:
D
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