The average weight of M,N and O is equal to 65 kg. The average weight of M and N is equal to 69.5 kg. The average weight of N and O is 66.5 kg. What is the weight of N ?
What will be the average of the following set of numbers ?
678, 193, 285, 494, 342, 762
The mean of 15 different natural numbers is 13. The maximum value of the second largest of these numbers is
In a group of 5 friends, the sums of ages (in years) of each group of 4 of them are 124, 128, 130, 136 and 142. The age (in years) of the youngest of them is
The mean of n observations is x1. If the first observation is increased by 1, second by 2, and so on, then their mean is x2 . The value of x2 - x1 is
The average of marks obtained in 120 students was 35. If the average of passed candidates was 39 and that of failed candi- dates is 15, the number of candidates who passed the examination is:
The age of Mr. Bhagat in 2002 was 1 /90 of his birth year. What is his age in 2006 ?
