Question : 60% of 40% of a number is equal to 150. What is the 20% of that number?
Option 1: 175
Option 2: 145
Option 3: 200
Option 4: 125
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Correct Answer: 125
Solution : Let the number be $x$. According to the question, $\frac{60}{100}\times\frac{40}{100}\times x=150$ ⇒ $\frac{3}{5}\times\frac{2}{5}\times x=150$ $\therefore x=625$ Now, 20% of $x$ = $\frac{20}{100}\times x$ = $\frac{1}{5}\times 625$ = 125 Hence, the correct answer is 125.
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