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Q.

The sum of first 50 natural numbers is

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a

1275

b

1725

c

2500

d

7125

answer is A.

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Detailed Solution

The sum of first ‘ $n$ ’ natural numbers is $\frac{n (n + 1)}{2}$ .

The sum of first ‘ $50$ ’ natural numbers $= \frac{50 \times (50 + 1)}{2} = \frac{50 \times 51}{2} = 1275$

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The sum of first 50 natural numbers is