An amount of Rs. 680 was invested at 6% rate of interest and another sum of money was invested at 10% interest. If the average interest on the total at the end of the year was 7.5%, how much was invested at 10%?

Arun Roy 3 years ago

answer must be 255

Jasveer Kaur 4 years ago

408 answer is correct ,because 680 amount given only at 6 % interest rate . Not both rates

Rezaul Karim 6 years ago

Answer must be 255 at 10% and 425 at 6%

Manik Paul 6 years ago

Nice method.

Aditya Kashyap 8 years ago

the ans should be 255...

Nitin Rajpoot 9 years ago

In allegation formula we put
Cheap price. Costly price
Avgprice

Cheap commodity : costly commodity ratio
That is 2.5:1.5
Or 5:3
So acc to the formula ratio for 10% is 3
Then we will ger 3*680/8= 255/-
How did u do that...pls explain

Rohan Shinde 9 years ago

What is this method called? The cross ratio one. I want to learn it.

Shirshendu Majumder 10 years ago

Can any 1 solve this ques by using simple interest formula

Manpreet Kaur 10 years ago

It can be solve by using simpleinterest formula but we can save time by using this method so it is best

Shahjahan Ali 10 years ago

Ratio is clearly showing is 5:3, hence investment is 10% is 3/8*680=255

Priyanka 11 years ago

ans is given 480 and in soln part it is 408 . which is currect