What is the value of 70% of 420 + 30% of 280?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 378
Work out each percentage separately and add; x% of a number is \(\frac{x}{100}\) times the number.
70% of 420 \(=0.7\times420=294\)
30% of 280 \(=0.3\times280=84\)
\(294+84=378\)