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Practice Average – Third proportion of 10 and 20 is

Practice Average – The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :

Practice Average – The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46 degrees. If the temperature on Monday was 42 degrees. Find the temperature on Friday ?

Practice Average – The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?

Practice Average – The average of two numbers is M. If one number is N, then the other number is :

Practice Average – The average weight of 6 men decreases by 3 kg when one of them weighing 80 kg is replaced by a new man . The weight of the new man is

Practice Average – The average age of 12 students is 20 years. If the age of one more student is included, the average decreases by 1, what is the age of the new student?

Practice Average – The average height of 30 boys out of a class of 50, is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is :

Practice Average – The average of three numbers is 20. If two numbers are 16 and 22, the third is :

Practice Average – In a market survey, 20% opted for product A whereas 60% opted for product B. The remaining individuals were not certain. If the difference between those who opted for product B and those who were uncertain was 720, how many individuals were covered in the survey ?

Practice Average – The average weight of 3 men A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E, whose weight is 3 kg more than that of D, replaces A then the average weight of B, C, D and E becomes 79 kg. The weight of A is :

Practice Average – The average of the first five prime numbers greater than 20 is:

Practice Average – The average of 11 observations is 60. If the average of first five observations is 58 and that of the last five is 56, then the sixth observation is :

Practice Average – Three years ago the average of A and B was 18 Years. With C joining them now, the average becomes 22 years. How old is C now?

Practice Average – The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.2 years. The average age of new students is :