Average Questions

The mean of marks secured by 45 students in division A of class X is 69, 65 students of division B is 65 and that of 50 students of division C is 63. Find the mean of marks of the students of three divisions of Class X.

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

Find the mean value of 2, 3, 3, 4, 6, 7

The average height of 50 bats is 126 cm. Some bats of average height 120 cm are removed. If the new average height is 130 cm, then how many bats are remaining?

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

Among four students sitting in a row, average age of last three students is 20 years and the average age of first three students is 21 years. If the age of first student is 26 years, then what is the age (in years) of the last student?

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is

The mode of the data 12, 1, 10, 1, 9, 3, 4, 9, 7, 9 is