Question
Find the average of natural numbers from 1 to 69. (both
included)Solution
Here, n = 69 Sum of first 69 natural numbers = 69 × (69 + 1) / 2 Sum of first 69 natural numbers = 69 × 70 / 2 Sum of first 69 natural numbers = 4830 / 2 Sum of first 69 natural numbers = 2415 Average = Sum of first 69 natural numbers / 69 Average = 2415 / 69 Average = 35 The average of natural numbers from 1 to 69 is 35.
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