Averages Level - 1

The average age of a group of 9 family members is 22 years. LAVGIR is the youngest and his age is 6 years. What was the average age of the family just before LAVGIR was born?

The average weight of 100 students is 32 kg. The average weight of first 49 students is 30 kg, and that of last 50 students is 34 kg. What is the weight (in kg) of the 50th student?

What is the average of all numbers between 100 and 200 which are divisible by 13?

In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average is 42?

In a class of 50 students, 40% are girls. The average weight of the boys is 62 kg and that of the girls is 58 kg. What is the average weight (in kg) of the whole class?

The average of eleven numbers is 54. The average of the first four numbers is 48 and that of the next four numbers is 25% more than the average of the first four. The ninth number is 8 greater than the 11th number, and the tenth number is 4 greater than the 11th number. What is the average of the 9th and the 10th numbers?

Three numbers are such that if the average of any two of them is added to the third number, the sums obtained are 164, 158 and 132 respectively. What is the average of the original three numbers?

Given four different numbers, the average of the first three numbers is four times the fourth number and the average of all the four numbers is 52. What is the average of the first three numbers?

The average of n numbers is 36. If each of 75% of the number is increased by 6 and each of the remaining numbers is decreased by 9, then the new average numbers is

The average of eleven numbers is 68. The average of the first four numbers is 78 and that of the next four numbers is 63. The ninth number is twice the eleventh number and the tenth number is 4 less than eleventh number. Find the average of ninth and eleventh number.