# Percentage- Aptitude Questions and Answers

 Two students appeared for an examination. One of them secured 10 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are ? A) 52 and 42 B) 68 and 58 C) 63 and 53 D) 15 and 5 Correct Answer :15 and 5 Explanation :Let, the marks of first students be x Then marks of second students be (x + 10) According to the questions (x + 10) = 75/100(x + x + 10) x + 10 = 3/4 (2x + 10) x + 10 = 3/2 (x + 5) 2x + 20 = 3x + 15 x = 5 and x + 10 = 15 A certain company has 120 employees who are engineers. Here, engineers constitute 30% of its work force. How many people are employed in the company? A) 500 B) 400 C) 300 D) 200 Correct Answer :400 Explanation :Let the number of employee = X 30% of X = 120 (30/100)*X = 120 So, number of employee in company= X= 400 23% of a bucket full of diluted milk was water. If the quantity of pure milk in the bucket was 15.4 liter, then the capacity of the bucket was ? A) 20 liter B) 22 liter C) 20.9 liter D) 19.8 liter Correct Answer :20 liter Explanation :capacity of the bucket = X water in the bucket = 23% of X = 23*X /100 pure milk in bucket = X - 23*X/100 = 15.4 => 100*X - 23*X = 15.4 *100 => 77*X = 1540 => X = 20 liter If x is 15% of y and y is 40% of z, then x+y is what % of z ? A) 6 B) 21 C) 46 D) 55 Correct Answer :46 Explanation :Let z= 100 So, y is 40% of z = 40 x is 15% of y = 6 x+y= 46 that is 46% of z