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The average income of 3 friends in a group of six is Rs. 6,600 and that of the other two is Rs. 6,500. If the average income of all the six is Rs. 6,400, find the income of the 6th friend.
Sol :
Average Income of 3 Friends = Rs. 6,600
So, Total Income of 3 friends = 3 X 6,600 = Rs. 19,800
Average income of 2 friends = 2 X 6,500
So, Total income of 2 friends = 2 X 6,500 = 13,000
Average income of 6 friends = Rs.6,400
Total income of 6 friends = 6 x 6,400 = Rs. 38,400
So, income of 6th friend = Total income of 6 friends - Total income of 5 friends
= Rs.38,400 - Rs.32,800 = Rs.5,600
The average of Ramesh's marks in English, Maths and Science is 75 and the average of his marks in English, Maths, Science and Hindi is 70. How many marks did he score in Hindi?
Sol :
The average marks in English, maths and Science is 75
So, Total marks in English, maths and Science are 3 X 75 = 225
The average marks in English, Maths, Science and Hindi are 70.
So, Total marks in English, Maths, Science and Hindi are 4 X 70 = 280
So, Marks in Hindi = 280 - 225 = 55
The average age of the husband, his Wife and their Son ten years ago was 25 Years and that of the husband and wife six years ago was 37 years. What is the present age of the son (in years) ?
Sol :
Average age of the husband, his wife and their son ten years ago was 25 years
Total of present ages of husband, wife and their son
= (25 x 3) + 10 + 10 + 10 = 105 Years
Average age of the husband and his wife six years ago was 37 years
Total of present ages of husband and wife
= (37 X 2) + 6 + 6 = 86
So, Son's present age = 105 - 86 = 19 Years
The average of A and B is 30 years. If C were to replace A, the average age would be 40 years and if he were to replace B, the average age would be 35 years. What is A's age?
Sol :
Average age of A and B = 30 Years
Total age of A and B = 30 x 2 = 60 years ---------- (1)
Average age of B and C = 40 Years
Total age of B and C = 40 X 2 = 80 years ---------- (2)
Average age of A and C = 35 years
Total age of A and C = 35 X 2 = 70 years ---------- (3)
After adding (1) and (3) , we get
2A + B + C = 130
But, we know that (B + C) = 80
So, 2A + B + C = 130
=> A = (130 - 80) / 2 = 25
So, A's age is 25 years.
Thats all for now friends... Tomorrow we shall do some more practice problems on this... Share with your friends if you like this post... Happy Reading :)
Average Income of 3 Friends = Rs. 6,600
So, Total Income of 3 friends = 3 X 6,600 = Rs. 19,800
Average income of 2 friends = 2 X 6,500
So, Total income of 2 friends = 2 X 6,500 = 13,000
Average income of 6 friends = Rs.6,400
Total income of 6 friends = 6 x 6,400 = Rs. 38,400
So, income of 6th friend = Total income of 6 friends - Total income of 5 friends
= Rs.38,400 - Rs.32,800 = Rs.5,600
The average of Ramesh's marks in English, Maths and Science is 75 and the average of his marks in English, Maths, Science and Hindi is 70. How many marks did he score in Hindi?
Sol :
The average marks in English, maths and Science is 75
So, Total marks in English, maths and Science are 3 X 75 = 225
The average marks in English, Maths, Science and Hindi are 70.
So, Total marks in English, Maths, Science and Hindi are 4 X 70 = 280
So, Marks in Hindi = 280 - 225 = 55
The average age of the husband, his Wife and their Son ten years ago was 25 Years and that of the husband and wife six years ago was 37 years. What is the present age of the son (in years) ?
Sol :
Average age of the husband, his wife and their son ten years ago was 25 years
Total of present ages of husband, wife and their son
= (25 x 3) + 10 + 10 + 10 = 105 Years
Average age of the husband and his wife six years ago was 37 years
Total of present ages of husband and wife
= (37 X 2) + 6 + 6 = 86
So, Son's present age = 105 - 86 = 19 Years
The average of A and B is 30 years. If C were to replace A, the average age would be 40 years and if he were to replace B, the average age would be 35 years. What is A's age?
Sol :
Average age of A and B = 30 Years
Total age of A and B = 30 x 2 = 60 years ---------- (1)
Average age of B and C = 40 Years
Total age of B and C = 40 X 2 = 80 years ---------- (2)
Average age of A and C = 35 years
Total age of A and C = 35 X 2 = 70 years ---------- (3)
After adding (1) and (3) , we get
2A + B + C = 130
But, we know that (B + C) = 80
So, 2A + B + C = 130
=> A = (130 - 80) / 2 = 25
So, A's age is 25 years.
Thats all for now friends... Tomorrow we shall do some more practice problems on this... Share with your friends if you like this post... Happy Reading :)
very good job by you people....really helpful to us....thanks a lot ....
ReplyDeletesuperb .....thank you very much.
ReplyDeleteits a good job ........its really helpful to us........thnks to u...
ReplyDeletethank's very helpful
ReplyDeletebut not enough for PO aspirants
plz provide some high level of questions
most importantly with shotrcut tricks
thank's for yr gr8 work
god bless u all
thank's once again
Agreed Friend. We surely will try to increase the difficulty level in our upcoming posts. Good Day :)
Deletethnx...and ur website is very much useful.....it wil be really more helpful if
ReplyDeleteu upload some practice sets like mock exam
superb its really a short method to wrk out hatsoff please include some more prblms
ReplyDeletemani
want more questions pls.......
ReplyDeleteIts superb...:-) But there is no shorcut..its lengthy.try to do something 4 that... Thank u
ReplyDeletesuperb:)
ReplyDeleteIts good. but i need shortcut method.
ReplyDeletethanks very useful
ReplyDeletesuper
ReplyDeletePL. PROVIDE MORE DIFFICULT QUESTION AND ANSWERS
ReplyDeletethanks ...hope it ll help...
ReplyDeleteThanks............
ReplyDeletevery useful thanks :)
ReplyDeletethank u
ReplyDelete