The average of 3 numbers is 65. Two of the numbers are 60 and 75. The third number is?
- 60
- 50
- 40
- None of these
Explanation
Let's find the third number:
Average = (Sum of numbers) / 3
65 = (60 + 75 + x) / 3
65 × 3 = 60 + 75 + x
195 = 135 + x
x = 195 - 135
x = 60
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