The mean temperature of Monday and Thursday was 36°C. If the temperature on Thursday was $\frac{4}{5}$ th of that of Monday, then what was the temperature on Thursday ?
The sum of five numbers is 555. The average of first two numbers is 75 and the third number is 115. What is the average of last two-numbers ?
Average of first five multiples of 5 is :
The average of 8 numbers is A and the average of four of these is B. If the average of remainig four is C, then
The average of the two-digit numbers, which remain the same when the digits interchange ther positions is:
The average temperature of Gwalior, Agra and Lucknow is 37o C. The average temperature of Agra, Gwalior and Delhi is 38o C. If the temperature of Delhi is 39°C, find the ratio of temperature of Delhi to that of Lucknow ?
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:
