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Mr. Quddus rents a room for N months. He pays Tk. K for each of the first 7 months, and half that rate for each additional month. Find the total charge if N > 7.

A. 7k+2kn

B. 7k+n/2

C. K+2k(n-7)

D. K+k/2(n-7)

E. 7k+k/2(n-7)

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সঠিক উত্তরঃ E. 7k+k/2(n-7)

Explanation:

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Mr. Quddus rents a room for N months. He pays Tk. K for each of the first 7 months, and half that rate for each additional month. Find the total charge if N > 7.