Question : The average of 8 numbers is 21. If each of the numbers is multiplied by 8, the average of the new set of numbers is:
Option 1: 21
Option 2: 29
Option 3: 8
Option 4: 168
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Correct Answer: 168
Solution : Given: The average of 8 numbers = 21 Required new average = Old average × 8 $\therefore$ New average = 21× 8 = 168 Hence, the correct answer is 168.
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Question : The average of nine consecutive numbers is $n$, if the next two numbers are also included the new average will be:
Question : Three numbers are such that the average of the first two numbers is 2, the average of the last two numbers is 3 and the average of the first and the last numbers is 4. What is the average of the three numbers?
Question : If the sum of squares of two real numbers is 12 and the product of the numbers is 4, find the difference between the numbers.
Question : Three numbers are such that the average of the first two numbers is 2, the average of the last two numbers is 3 and the average of the first and last number is 4, then the average of the three numbers is equal to:
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