Question

500 oranges and 400 bananas were purchased by a merchant. He discovered that 10% of oranges and 20% of bananas were rotten. How many oranges and bananas are not rotten?

• A. 550, 480
• B. 320, 450
• C. 480, 500
• D. 450, 320

Answer 1

The correct option is D 450, 320

Given:
Number of oranges $=500$
Number of bananas $=400$
Percentage of oranges that are rotten $=10\%$
Percentage of bananas that are rotten $=20\%$
So, number of rotten oranges $=10\%\text{of}500$
$=\frac{10}{100}\times 500$
$=50$
and number of rotten bananas $=20\%\text{of}400$
$=\frac{20}{100}\times 400$
$=80$
Hence, number of oranges that are not rotten $=500-50$
$=450$
Number of bananas that are not rotten $=400-80$
$=320$