The sum of the following series 4 + 44 + 444 + ............ to n term is:

CA Foundation · Quantitative Aptitude · MTP · June 2024
The sum of the following series 4 + 44 + 444 + ............ to n term is:
(A) A. 4 / 9 [ 10(10 n -1) / 9 - n]
(B) B. 4 / 9 [ 10(10 n -1) / 9 + n]
(C) C. 10 / 9 (10 n - 1) + n
(D) D. None of these

Suggested Answer and Working Notes:

Correct Answer: Option (A)

A. 4 / 9 [ 10(10 n -1) / 9 - n]

Topics: Part-A: Business Mathematics

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