The average weight of 29 students is 40 kg. If the weight of teacher be included the average weight increased by 400 gms. The weight of the teacher is-

The average of the three numbers is 60. The first number is one-fourth of the sum of the remaining two numbers, the first number is-

The average of 19 numbers is 24. If each number is multiplied by 3, what is the new average?

Find the average of the following set of numbers.
132, 148, 164, 128, 120, 136

The average of 8 readings is 24.3, out of which the average of the first two is 18.5 and that of next three is 21.2. If the sixth reading is 3 less than seventh and 8 less than eight, what is the sixth reading? 

In a school with 600 students the average age of the boys is 12 years and that of the girl is 11 years. If he average age of the students is 11 years 9 months, then the number of girls in the school is

Average of 11 number is 30. If the average of first 10 numbers is 22, then find the 11th number?

Average of 21 number is 36. If the average of first 12 numbers is 15, then find the average of remaining 9 number?