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A. 120
B. 200
C. 180
D. 150
E. None of these

Explanation:

Let the number be x.

30% of x = 30/100 * x = 3x/10
20% of x = 20/100 * x = x/5 = 2x/10.
Given that 3x/10 – 2x/10 = 18 => x = 180.
Required number is 180.

Correct Answer: 180

Last Updated: February 07, 2020