Find investment from the following:

National Income = Rs 600

Autonomous consumption =Rs 150

Marginal Propensity to Consume = 0.70

Here, Y = Rs 600, C = Rs 150, MPC or b = 0.70

We know that,

Y = C + S or Y - C = S or S =600 - ($\overline{S}$ + bY) =600 - (150 + 0.7 x 600) =

600 -(150 + 420) =600 - 570 = Rs 30

As, l = S = Rs 30 (At equilibrium level of income)

Hence, Investment = Rs 30