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Find the sum of all the natural numbers from 21 to 50. |
1065 1055 1045 1035 |
1065 |
The correct answer is Option (1) → 1065 number of natural numbers from 21 to 50, n = 30 This is an Arithmetic Progression, Thus, Sum of all natural number from 21 to 50 = \( {S}_{n} \) = \(\frac{n}{2}\) × [First term + Last term] = \(\frac{30}{2}\) × [21 + 50] = 1065 |
