Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is

A. 11 B. 3 C. 8 D. 5 Answer: Option D
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Solution(By Apex Team)

In two A.P.’s common-difference is same Let A and a are two A.P. ’s First term of A is 8 and first term of a is 3 $\begin{array}{l} A_{30}-a_{30}=8+(30-1) d-3-(30-1) d \\ =5+29 d-29 d \\ =5 \end{array}$

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