Question Detail
Question
In an arithmetic progression, the 5th term is 20 and the 10th term is 40. What is the common difference?
Correct Answer
Option B is the correct answer.
Detailed Explanation
a₅ = a + 4d = 20, a₁₀ = a + 9d = 40. Subtract: 5d = 20 ⇒ d = 4.
Hint
The notes indicate answer B.