Theory- Percentage: Basic Concepts, Formulas
11. x of y is y% of?
(a) x
(b) x/100
(c) 100x
(d) y/100
12. A student has to secure 40% marks to pass. He gets 178 marks and fails by 22 marks. The maximum marks are?
(a) 200
(b) 500
(c) 800
(d) 1000
13. In an examination 1100 boys and 900 girls appeared. 50% of the boys and 40% of the girls passed the exam. The percentage of candidates failed is?
(a) 45
(b) 45.5
(c) 54.5
(d) 59.2
14. From a container having pure milk, 20% is replaced by water and the process is repeated thrice. At the end of the third operation, the milk is?
(a) 40% pure
(b) 50% pure
(c) 512% pure
(d) None of these
15. 300 grams of sugar solution has 40% sugar in it. How much sugar should be added to make it 50% in the solution?
(a) 10 grams
(b) 40 grams
(c) 60 grams
(d) 30 grams