X invested three- nineth, Y invested three-seventh of the remaining and Zth remaining. If Y earned Rs.840 as profit pr each year. Find the average monthly profit of all. A) 510 B) 490 C) 630 D) 370
Answer: B)
Let total amount puts by X, Y& Z be P
X’s investment = 3/9 P
Balance investment =6/9 p
Y’s investment =6/9*P*3/7=2/7 P
Remaining investment =8 p/21 =Z’s amounts
Profit ratio of X,Y &Z,
X:Y:Z=3/9 *P:2/7 *P:8/21*p=7:6:8
1month share =840/12=Rs .70
Average monthly profit of X, Y, Z=70/3 *21
=Rs.490