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The average of 50 consecutive natural numbers is x. What will be the are average when the next four natural numbers are also included?

x + 1
x + 2
x + 4
x + (x/54)

Correct Answer: x + 2

Explanation:

Sum of n consecutive natural numbers = n(n+1)/2

Average of n consecutive natural numbers = (n+1)/2

For first 50 average = 51/2 = x

Last 50 average = 55/2 = x+2

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