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 still usable?

• A. $550$, $360$
• B. $450$, $440$
• C. $450$, $320$
• D. $550$, $360$

Answer 1

The correct option is C $450$, $320$

Given that,
number of oranges $=500$
number of bananas $=400$
rotten oranges $=10$%
rotten bananas $=20$%
So,
number of rotten oranges $=10$% of $500$
$=\frac{10}{100}\times 500$
$=50$
number of rotten bananas $=20$% of $400$
$=\frac{20}{100}\times 400$
$=80$
Hence,
Oranges in good condition $=500-50$
$=450$
Bananas in good condition $=400-80$
$=320$