Question

The sum 1 – 2 + 3 – 4 _ _ _ _ _ + 47 – 48 + 49 is
A) 0 B) 24 C) 25 D) (49 50)/2

Answer 1

Answer:

a. 0

we r subtracting one value and adding

so the final result will be 0

Answer 2

Concept introduction:

A summation, also known as a sum, is the outcome of adding two or more numbers or quantities. There are always an even number of terms in a summation. There may be only two terms, or there could be one hundred, thousand, or a million. There are summations with an infinite number of terms.

Given:

Here the expression given $1 - 2 + 3 - 4 ----- + 47 - 48 + 49$.

To find:

We have to find the the value of the summation.

Solution:

According to the question,

We have $48/2 = 24$ pairs of numbers where there’s a positive followed by a negative with a one-greater absolute value, giving

$24 * (-1) + 49\\=25$

Final answer:

So, the final answer of the question is $(C)25$.

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