Discussion
George gets a discount of 30% and then 20% on his food bill of Rs. 1250. What is the total discount he got?
Answer: A
The question asks for the single equivalent discount, which comes from multiplying the retained fractions.
\[ (1 - 0.30)(1 - 0.20) = 0.70 \times 0.80 = 0.56 \]
\[ \text{total discount} = 1 - 0.56 = 0.44 = 44\% \]
The bill amount of Rs. 1250 is not needed: the percentage is the same whatever the bill. Adding 30% and 20% gives 50%, which overstates the saving by the product \( 0.30 \times 0.20 = 6\% \).
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