• Mayur Vihar 3 Delhi, 110096 India

Back to Test Series
Grade 10th Mathematics Chapter Arithmetic Progressions Test Series

  In an AP if a = 1, an = 20 and Sn = 399 , then n is ?

Type: MCQ • Marks: 1
  In an AP if a = 1, an = 20 and Sn = 399 , then n is ?
Options
A. 19
B. 21
C. 38
D. 42
Correct answer is available inside the full test series attempt.

Practice more

This page is indexed for search so students can find questions directly from Google.

View full Test Series Browse Test Series
Login / Register
Go Back Top