**Download NCERT Solutions For Class 10 Maths Chapter 5 Exercise 5.3 – Arithmetic Progressions**

**1. Find the sum of the following APs.**

**(i) 2, 7, 12, …. to 10 terms.**

**Solution: **

For this A.P.

a = 2

d = 7-2 = 5

Number of term (n) = 10

As we know that,

S_{n} = [2a+(n-1)d]

S_{10} = [2×2+(10-1)5]

S_{10} = 5[4+45]

S_{10} = 245

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