20
17
15
25
The average of 6 observation is 12. A new 7th observation is included and the new average is decrease by 1 , the seventh observation is ?
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