Let the original bill amount be ₹x.
Two successive discounts are given:
First discount = 30%
Second discount = 20
Step 1: Apply first discount (30%)
After 30% discount, price becomes:
x×(1−0.30)=0.7x
Step 2: Apply second discount (20%) on the reduced price
0.7x×(1−0.20)=0.7x×0.8=0.56x
So, the final price paid = 0.56x
Given:
0.56x=840
x=0.56840
x = 1500
Original bill amount = ₹1500