![]() ![]() Now, there is 4+12 = 16 L of bleach in 16 L of water in a total of 32 L of solution. Let the amount of bleach added be x litres. In the second part, Extra bleach is added to bring it to 50% of total solution. Let’s note the details in a table for better clarity and understanding. In the first part, there is 20% of bleach in 20 L of solution → 4 L of bleach in 16 L of water = 20 L of solution. How much water has to be added further to bring it back to 20% bleach solution? Extra bleach is added to it to make it to 50% bleach solution. There is a 20 litres of a solution which has 20% of bleach. So in order to get a 8% chlorine solution, we need to add 90-60 = 30 ml of water. In order for this 7.2 ml to constitute 8% of the solution, we need to add extra water. Therefore, 7.2 ml is present in 60 ml of water. Let x ml of chlorine be present in water. If a 60 ml of water contains 12% of chlorine, how much water must be added in order to create a 8% chlorine solution? ![]() Therefore, 20 kgs of sugar is required for 60 kgs of sweet. We need to find the quantity of sugar required for 60 kgs of sweet. Let the quantity of sugar required be x kgs.ģ kgs of sugar added to 6 kgs of flour constitutes a total of 9 kgs of sweet.ģ kgs of sugar is present in 9 kgs of sweet. If 60kgs of this sweet has to be prepared, how much sugar is required? Therefore, 45 litres of sugar solution has to be added to bring it to the ratio 2:1.Ī certain recipe calls for 3kgs of sugar for every 6 kgs of flour. Let the quantity of sugar solution to be added be x litres. So, 45-15 = 30 litres of salt solution is present in it. Number of litres of sugar solution in the mixture = (1/(1+2)) *45 = 15 litres. What is the amount of sugar solution to be added if the ratio has to be 2:1? In a mixture of 45 litres, the ratio of sugar solution to salt solution is 1:2. If a : b = c : d, then a, b, c, d are said to be in proportion and written as a:b :: c:d or a/b = c/d.Ī, d are called the extremes and b, c are called the means.įor a proportion a:b = c:d, product of means = product of extremes → b*c = a*d. Therefore, number of ice-cream cones in the box = 8*6 = 48.Ī lot of questions on ratio are solved by using proportion.Ī proportion is a comparison of two ratios. Let the number of chocolates be 5x and the number of ice-cream cones be 8x. If the ratio of chocolates to ice-cream cones in a box is 5:8 and the number of chocolates is 30, find the number of ice-cream cones. So the number of ‘B’ blocks is 7*50 = 350. Let the number of the blocks A,B,C,D be 4x, 7x, 3x and 1x respectively If the number of ‘A’ blocks is 50 more than the number of ‘C’ blocks, what is the number of ‘B’ blocks? The ratio of blocks A:B:C:D is in the ratio 4:7:3:1. Question: In a bag, there are a certain number of toy-blocks with alphabets A, B, C and D written on them. So the number of lawyers in the group is 4*8 = 32. Let the number of doctors be 5x and the number of lawyers be 4x. If the total number of people in the group is 72, what is the number of lawyers in the group? Question: In a group, the ratio of doctors to lawyers is 5:4. Women : total number of people = 28 : 49 = 4 : 7 What is the ratio of men to women? What is the ratio of women to the total number of people? Question: In a certain room, there are 28 women and 21 men. It also means that in every five students, there are two boys and three girls. Here, 2 and 3 are not taken as the exact count of the students but a multiple of them, which means the number of boys can be 2 or 4 or 6…etc and the number of girls is 3 or 6 or 9… etc. Notation: Ratio of two values a and b is written as a:b or a/b or a to b.įor instance, the ratio of number of boys in a class to the number of girls is 2:3. Ratio is the quantitative relation between two amounts showing the number of times one value contains or is contained within the other. Whether you are using units from the Metric system (as we do in this post) or US measurement system (the GMAT being an American test), the concepts don’t change. ![]()
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