Question

The sum of the first 10 terms of an arithmetic progression is 150. If the first term is 10, what is the common difference?

• A. 10/5
• B. 10/3
• C. 10/9
• D. 10/2

Hint:

Remember: The sum of an arithmetic progression can be calculated using the formula \( S_n = \frac{n}{2} \left( 2a + (n-1)d \right) \).