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The average of 6 observations is 12. A new seventh observation is included and the new average is decreased by 1. Find the seventh observation.
The average of 7 consecutive numbers is 20. The largest of these numbers is
The average of 8 number 21. if each of the number is multiplied by 8,the new set of number is ?
The average of 8, 9, 12, 13, 15, 9 is
The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?
The average of first five multiple of 3 is
The average of first five multiples of 3 is:
The average of first nine multiples of 3 is ?
The average of five consecutive numbers is ‘n’. If the next two numbers are also included, then the average
The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers :