Out of 10 teachers of a school, one teacher retires and in place of him a new teacher 25 years old joins. As a result of…

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

A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and thereby decreased his average …

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

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 average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 …

The average weight of 16 boys in a class is 50.25 kgs and that of the remaining 8 boys is 45.15 kgs. Find the average we…

A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 a…