DRDO Multi tasking staff Model paper 7

Given:
Rate of interest = 9.5%
Amount after 6 years = Rs 942
Concept used:
Simple Interest, SI = PNR/100
Where P = principal, R = rate of interest and N = time
Amount = SI + P
Calculation:
SI = Amount - P
⇒ (942 – P) = (P × 9.5 × 6) /100
⇒ 94200 – 100P = 57P
∴ P = Rs. 600
∴ The amount invested initially is Rs 600.