What is the sum of the first 50 natural numbers?

2550

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1275

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3000

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3250

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Solution

The correct option is B
1275

The sum of first $n$ natural numbers is given by
$S_{n} = \frac{n (n + 1)}{2} .$
Here, $n = 50.$
$\Rightarrow S_{50} = \frac{50 (50 + 1)}{2} = \frac{50 \times 51}{2} = 25 \times 51 = 1275$

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