Averages Learning Test 1

What is the average of the following set of numbers?

254, 312, 236, 273, 280 

• 241

• 251

• 271

• 281

The average age of A, B and C is 32 years. If the average age of A and C is 35 years, what is the age of B in a year?

• 25 years

• 28 years

• 27 years

• 24 years

A cricketer scored 155 runs in the first test and 305 runs in the second. How many runs should he score in the third test so that his average score in the three tests would be 242 runs?

• 266

• 252

• 270

• 280

Average of 20 positive numbers is x. If each number is increased by 25, then x :

• Increased by 25

• Increased by 10%

• Increased by 125

• Increased by 125%

 Average weight of 20 boys is more than the average weight of 30 girls by 10 kg. If the total weight of the 20 boys is 1100 kg, what is the average of the 20 boys and 30 girls together?

• 45 kg

• 47 kg

• 49 kg

• 51 kg

 In Arun's opinion, his weight is greater than 85 kg but less than 92 kg. His brother does not agree with Arun and he thinks that Arun's weight is greater than 80 kg but less than 90 kg. His mother's view is that his weight cannot be greater than 88 kg. If all of them are correct in their estimation, what is the average of different probable weights of Arun?

• 84 kg

• 86kg

• 87 kg

• 68 kg

Three years ago, the average age of a family of 6 members was 19 years. A baby having been born, the average age of the family is the same today . The present age of the baby is: 

• 2 years

• 1 years

• 3 years

• 4 years

The average weight of 3 men A, B and C is 74 kg. Another man D joins the group and the average now becomes 70 kg. If another man E, whose weight is 3 kg more than that of D, replaces A then the average weight of B, C, D and E becomes 69 kg. The weight of A is:

• 65 kg

• 61 kg

• 62 kg

• 63 kg

The average age of 27 students and a teacher of a Class are 16 years. If the age of teacher is excluded the average age of class is reduced by 1. What is the age of the teacher? 

• 53 years

• 43 years

• 50 years

• 40 years

Average weight of 16 students is 20 kg. If the average weight increases by 0.2 kg when Suresh, one of the students leaves the group, what is Suresh's weight?

• 19 kg

• 20 kg

• 10 kg

• 17 kg