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Question

The Median of first (2n + 1) natural numbers is (n + 103)\over3. Find the value of n.

WBBSE Class X Mathematics Partnership 02 Mark 2025

Answer

The first (2n + 1) natural numbers are 1, 2, …, (2n + 1).

Their median is the middle term, which is n + 1.

So, we have:

n + 1 = (n + 103)\over3.

or, 3(n + 1) = n + 103

or, 3n + 3 = n + 103

or, 2n = 100

or, n = 50.

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