model 10 percentage with allegations & mixture Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

The ratio in which two sugar solutions of the concentrations 15% and 40% are to be mixed to get a solution of concentration 30% is

a) 9 : 8

b) 2 : 3

c) 3 : 2

d) 8 : 9

Question : 2

15 litres of a mixture contains alcohol and water in the ratio 1 : 4. If 3 litres of Water is mixed in it, the percentage of alcohol in the new mixture will be

a) 18$1/2$%

b) 15%

c) 16$2/3$%

d) 17%

Question : 3

In an alloy there is 12% of copper. To get 69 kg of copper, how much alloy will be required ?

a) 1736$2/3$kg

b) 424 kg

c) 575 kg

d) 828 kg

Question : 4

In 50 gm alloy of gold and silver, the gold is 80% by weight. How much gold should be mixed to this alloy so that the weight of gold would become 95% ?

a) 10 gm

b) 200 gm

c) 150 gm

d) 50 gm

Question : 5

How much water must be added to 100 ml of 80 per cent solution of boric acid to reduce it to a 50 per cent solution ?

a) 60 ml

b) 30 ml

c) 40 ml

d) 50 ml

Question : 6

300 grams of sugar solution has 40% of sugar in it. How much sugar should be added to make it 50% in the solution?

a) 80 gram

b) 40 gram

c) 10 gram

d) 60 gram