In a school there are 650 students. The ratio of the boys to that of the girls is 8:5. How many more girls should join the school so that the ratio becomes 4:3

8:5 => boys:girls => 8/13×650{ total number of children } = 400 boys => 650 - 400 = 250 girls.

((250 + x{ the extra number of girls required for the ratio }) / 400) = 4/3.

X = 50.

50 girls should be added in 650 boys=400 and girls=250 here boys are not increasing,girls are increasing 400/250+x=4/3 1200=1000+4x 4x=200 x=50 if we added 50 to girls are 300 ratios are:400:300=4:3

A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 : 5?

A bag contains Rs.1800 in form of one rupee, 50-paise and 25 paise coins in the ratio 3:4:12. How many coins are there of 25 paise?

In the 45 litres mixture of juice and water, the ratio of juice and water is 5:4. Find the quantity of water required to be added so that resultant mixture will be in ratio 4:5.