The average of 3 consecutive even natural numbers is 20. Next 5 consecutive even natural numbers to these 3 even natural numbers are also included. What is the sum of newly added numbers?
A.126
B.146
C.167
D.140✓ Correct
Explanation
The 3 consecutive even numbers average to 20, so they are 18, 20, 22. The next 5 even numbers are 24, 26, 28, 30, 32. Their sum = 5×18 + 50 = 90 + 50 = 140.
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