Average Example Question & Answer


Average Example Question & Answer

 

Example 1#:
The average presence of students of a class in a College on Monday, Tuesday and Wednesday is 32 and on the Wednesday, Thursday, Friday and Saturday is 30. if the average number of students on all the six days is 26 then the number of students who attended the class on Wednesday is?

Answer :
32 x 3 + 30 x 4 – 26 x 6
= 96 + 120 – 156
= 60.

 

 

Example 2#:
The average income of Arun, Bala and Chitra is Rs. 12,000 per month and average income of Bala, Chitra and David is Rs. 15,000 per month. If the average salary of David be twice that of Arun, then the average salary of Bala and Chitra is in Rs?

Answer :
Arun + Bala + Chitra = 12000*3 Bala + Chitra + David = 15000*3 David – Arun = 3000*3 = 9000 David = 2Arun David = 18000 and Arun = 9000 Average salary of Bala and Chitra, = (45000-18000)/2 = 13,500.

 

 

Example 3#:
The average expenditure of Sharma for the January to June is Rs. 4200 and he spent Rs. 1200 in January and Rs.1500 in July. The average expenditure for the months of February to July is:

Answer :
Total Expenditure(Jan – June)
= 4200 * 6
= 25200 Total Expenditure(Feb – June)
= 25200 – 1200 = 24000
Total Expenditure(Feb – July) = 24000 + 1500
= 25500/6 = 4250.

 

 

 

Example 4#:
The average price of 80 mobile phones is Rs.30,000. If the highest and lowest price mobile phones are sold out then the average price of remaining 78 mobile phones is Rs. 29,500. The cost of the highest mobile is Rs.80,000. The cost of lowest price mobile is?

Answer :
The price of the costliest and cheapest mobile
= (80*3000) – (78*29500)
= 99000 Cheapest Mobile Price
= 99000 – 80000 = 19000.

 

 

 

Example 5#:
Ramesh walked 6 km to reach the station from his house, then he boarded a train whose average speed was 60 kmph and thus he reached his destination. In this way he took a total time of 3 hours. If the average speed of the entire journey was 32 kmph then the average speed of walking is:

Answer :
Total Distance = 32 * 3
= 6 + 60 * x x
= 1.5 hour ;
Walking Speed = 6/1.5 = 4 kmph.

 

 

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