Question

What is the sum of the first 12 terms of an arithmetic progression if the first term is 5 and last term is 38?

• A. 73
• B. 258
• C. 107
• D. 276

Answer 1

Answer:

B. 258

Number of terms = n = 12 ⇒ Sn = 12/2{5 + 38} ⇒ Sn = 6{43} ⇒ Sn = 258