In an arithmetic progression and . Find .

Answer and explanation

Correct answer: A.

  1. Step 1: , so . Step 2. , then . Answer: 28. Why not the others: The others use ten steps instead of nine, a wrong , or no valid rule.

Practise more Algebra, Calculus, Geometry and Probability.

Free questions with an explanation for every one, and full timed NMT National Multi-Subject (Ukraine) mock tests.

All Algebra, Calculus, Geometry and Probability questionsTake a mock test

More Algebra, Calculus, Geometry and Probability questions