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# Average || 16.03.2021

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Question 1

Average of 3 numbers is 12. First number is 6 less than the average of the other two. Third number is 6 more than the average of other two. What is the difference between first and third number?

Question 2

Sachin Tendulkar has a certain average for 11 innings. In the 12th innings he scores 120 runs and thereby increases his average by 5 runs. His new average is

Question 3

The average weight of 60 students in a class is 56.4 kg. If 12 students having average weight 59.5 kg leave the class and 15 students have average weight 54 kg join the class, then what is the average weight (in kg) of the students in the class (correct to one decimal place)?

Question 4

The average revenue of 11 consecutive years of a company is ₹66 lakhs. If the average of first 6 years is ₹61 lakhs and that of last 6 years is ₹73 lakhs, then what is the revenue of the sixth year?

Question 5

The average of 50 numbers was calculated as 18. Three numbers 18, 32 and 65 were wrongly taken as 25, 29 and 56. What will be the correct average?

Question 6

The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of boys is 60. What is the percentage of boys in the class?

Question 7

The average monthly income of X and Y is Rs. 5,050. The average monthly income of Y and Z is Rs. 6,250 and the average monthly income of X and Z is Rs. 5,200. The monthly income of X is:

Question 8

A man purchases milk for three consecutive years. In the first year, he purchases milk at the rate of ₹7.50 per liter, in the second year, at the rate of ₹8.00 per liter and in the third year, at ₹8.50 per liter. If he purchases milk worth ₹4,080 each year, then the average price of milk per liter for the three years is

Question 9

The average of the ages of Sonu, Hari and Govind is 30 Years. If their ages are in the ratio of 4 : 5 : 6 respectively, then the difference between the ages of Sonu and Govind is

Question 10

The average of sales of a furniture shop in the years 2015, 2016, 2017, 2018 is ₹16300, and that of in the years 2016, 2017, 2018, 2019 is ₹18450. If the sales in 2019 are ₹9200, then what are the sales in 2015?
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