Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average…

The average of first five multiples of 3 is:

The arithmetic mean of the series 1, 2, 4, 8, 16, . . . . . . , 2<sup>n</sup> is -

Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expendit…

A cricketer scored some runs in his 21st innings, as a result, his average runs increased by 3. If the present average r…

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :

One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/…

The average age of a cricket team of 11 players is the same as it was 3 years back because 3 of the players whose curren…