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…

The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is :

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these…

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 motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/ hr. His average speed fo…

After replacing an old member by a new member, it was found that the average age of five members of a club is the same a…

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 gra…

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby d…