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30% of a number is 21 more than 15% of 120. What is the number?
- A95
- B110
- C125
- D130
Answer not set
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CCommunity
Let the number be a
∴ 30% of number = (30 × a)/100 = 0.3a
Now, 15% of 120 = (15 × 120)/100 = 18
∴ 30% of a = (15% of 120) + 21
⇒ 0.3a = 18 + 21
⇒ 0.3a = 39
⇒ a = 130
∴ 30% of number = (30 × a)/100 = 0.3a
Now, 15% of 120 = (15 × 120)/100 = 18
∴ 30% of a = (15% of 120) + 21
⇒ 0.3a = 18 + 21
⇒ 0.3a = 39
⇒ a = 130