SSC CGL Previous Year Questions: Average- 2 - SSC CGL MCQ

The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the number of natural numbers is:        (SSC Sub. Ins. 2015)

What is the arithmetic mean of first 20 odd natural numbers?        (SSC CGL 1st Sit. 2015)

3 years ago the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is       (SSC CHSL 2014)

The average salary of all the workers in a workshop is ₹ 8,000. The average salary of 7 technicians is ₹ 12,000 and the average salary of the rest is ₹ 6,000. The total number of workers in the workshop is     (SSC CHSL 2014)

A boy found that the average of 20 numbers is 35 when he writes a number '61' instead of '16'. The correct average of 20 numbers is       (SSC Sub. Ins. 2014)

The average height of 8 students is 152 cm. Two more students of heights 144 cm and 155 cm join the group. What is the new average height?      (SSC Multitasking 2014)

What is the Arithmetic mean of the first 'n' natural numbers?      (SSC CGL 1st Sit. 2015)

The average weight of 15 oarsmen in a boat is increased by 1.6 kg when one of the crew, who weighs 42 kg is replaced by a new man. Find the weight of the new man (in kg).        (SSC CGL 1st Sit. 2015)

There are 100 students in 3 sections A, B and C of a class. The average marks of all the 3 sections was 84. The average of B and C was 87.5 and the average marks of A is 70. The number of students in A was          (SSC CGL 2014)

The average age of boys in the class is twice the number of girls in the class. The ratio of boys and girls in the class of 50 is 4 : 1. The total of the ages (in years) of the boys in the class is               (SSC CGL 2014)

The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is       (SSC CHSL 2013)

On a journey across Kolkata, a taxi averages 50 km per hour for 50% of the distance. 40 km per hour for 40% of it and 20 km per hour for the remaining. The average speed in km/hour, for the whole journey is :        (SSC Sub. Ins. 2013)

The batting average for 30 innings of a cricket player is 40 runs. His highest score exceeds his lowest score by 100 runs. If these two innings are not included, the average of the remaining 28 innings is 38 runs. The lowest score of the player is:       (SSC Sub. Ins. 2013)

Average of first five prime numbers is       (SSC Multitasking 2013)

Out of 20 boys, 6 are each of 1 m 15 cm height, 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is      (SSC Multitasking 2013)

The average of 20 numbers is 15 and the average of first five is 12. The average of the rest is       (SSC CGL 2nd Sit. 2013)

If a, b, c, d, e are five consecutive odd numbers, their average is        (SSC CGL 2nd Sit. 2013)

The average of the first five multiples of 7 will be        (SSC CGL 2nd Sit. 2013)

Out of 40 boys in a class, average weight of 30 is 60 kg and the average weight of the remaining is 56 kg. The average weight (in kilogram) of the whole class is        (SSC CGL 2st Sit. 2013)

The average of the first nine integral multiples of 3 is        (SSC CGL 1st Sit. 2013)

The average of nine numbers is 50. The average of the first five numbers is 54 and that of the last three numbers is 52.Then the sixth number is       (SSC CGL 1st Sit. 2013)

A cricket player after playing 10 tests scored 100 runs in the 11th test. As a result, the average of his runs is increased by 5. The present average of runs is      (SSC CGL 1st Sit. 2013)

The average of 50 numbers is 38. If two numbers namely 45 and 55 are discarded, the average of the remaining numbers is :         (SSC CGL 1st Sit. 2013)

Out of 10 teachers of a school, one teacher retires and in his place, a new teacher of age 25 years joins. As a result, average age of teachers is reduced by 3 years. The age (in years) of the retired teacher is :       (SSC CGL 1st Sit. 2013)

The average weight of 12 crewmen in a boat is increased by 1/3 kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new men ?            (SSC CHSL 2012)

The average of four consecutive even numbers is 9. Find the largest number.           (SSC CHSL 2012)

A batsman in his 12th innings makes a score of 63 runs and there by increases his average scores by 2. What is his average after the 12th innings?           (SSC CHSL 2012)