Question : The sum of 11 numbers is 660. Find their average.
Option 1: 66
Option 2: 60
Option 3: 10
Option 4: 80
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Correct Answer: 60
Solution : Given: The sum of 11 numbers is 660. Use the formula, $\text{Average}=\frac{\text{Sum of values}}{\text{The total values}}=\frac{660}{11}=60$ Hence, the correct answer is 60.
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Question : The sum of 10 numbers is 686. What is their average?
Option 1: 67.5
Option 2: 65.5
Option 3: 68.6
Option 4: 66.6
Question : The average of 4 consecutive numbers is 64.5. What is the largest number among these numbers?
Option 1: 62
Option 3: 67
Option 4: 66
Question : The average of 4 numbers is 45. The average of the first two numbers is thrice the average of the other two numbers. What is the sum of the first two numbers?
Option 1: 122
Option 2: 105
Option 3: 125
Option 4: 135
Question : The average of numbers A and B is 16. The average of numbers B and C is 40, What is the difference between C and A?
Option 1: 48
Option 2: 12
Option 3: 80
Question : What is the average of the first 10 even numbers?
Option 1: 12
Option 2: 10
Option 3: 13
Option 4: 11
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