**Question:**

If sum of Rs.1000. & Rs.100 is invested it yields Rs.90& Rs.20 respectively then to get Rs.50 how much should be invested? (Plz elaborate)

Yes I got it Samiksha thanks and sry I got confuse bcz in 2nd sentence u hv written 40 instead of 20

Use y=mx+c formula y=investment, x=__interest__

I didn't got d logic of income decreased by 70

How it is 90-20?

Plz explain

Thanks a __lot__

1000 investment 90 income. 100 investment 40 income. Hence wen investment decreases by 900(1000-100) then income decreases by 70(90-20) similarly wen income decreases by 40(90-50) then investment decreases by 900*40/70=514 ( use cross multiplication) so investment is 486(1000-514)

A.less than 500

B.over 500

C.485

D.486

__Options__