study wrote:

Attachment:

new_PS_Prop_E.JPG

Answer E

from question we get the info that if rate of interest on investment A is 2R then on B is 3R.

we need to find amount in investment A

1. Lets consider P1 and P2 be amount put for investment A and B respectively so

P1*2R*1 /100= 50---eqn1 and P2*3R*1/100 =150----eqn2

from this we do not get the value of P1.hence option A is insuff

2. given P2 = 2P1

so interest on these for 1year will be

P1*2R*1/100 and 2P1*3R*1/100

so B is also insuff

considering both we get P1*2R*1 /100= 50---eqn1 and substituting P2 =2P1 in eqn2 we get 2P1*3R*1/100 = 150----eqn3 which is nothing but a multiple of eqn1 hence insuff