Question

If a cassette company were to make $1000$ CD's, how many of each type would make?

• A. $\text{semi classical}=20$ , $\text{classical}=10$ , $\text{folk}=40$ ,$\text{light}=30$
• B. $\text{semi classical}=200$, $\text{classical}=100$ , $\text{folk}=300$, $\text{light}=400$
• C. $\text{semi classical}=300$ , $\text{classical}=200$ , $\text{folk}=400$ , $\text{light}=800$
• D. $\text{semi classical}=100$ , $\text{classical}=50$ , $\text{folk}=150$ , $\text{light}=200$

Answer 1

The correct option is B $\text{semi classical}=200$, $\text{classical}=100$ , $\text{folk}=300$, $\text{light}=400$

$light>type=40\%of1000=400folk>type=30\%of1000=\left(\frac{30}{100}\right)\times 1000=300semi-classical=20\%of1000=\left(\frac{20}{100}\right)\times 1000=200classicaltype=10\%of1000=\left(\frac{10}{100}\right)\times =100$