The following table shows the number of working hours and the number of employees employed in a small scale industry<…

A company produces on an average 4000 items per must for the first 3 months. How many items it must produce on an averag…

In a certain factory there are five workers A, B, C, D and E. A can complete a work in 4 minutes, B in 5 minutes, C in 6…

The average score of a class of boys and girls in an examination is A. The ratio of boys and girls in the class is 3 : 1…

The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52. Then…

If the mean of 5 observations x, x + 2, x + 4, x + 6 and x + 8 is 11, then the mean of the last three observations is-

The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age o…

The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5&de…