Start learning 50% faster. Sign in now
Let the number of people who read ‘The Hindu and TOI (Only)’ be x Let the number of people who read ‘The Hindu and Economic Times (Only)’ be y. Let the number of people who read ‘TOI and Economics Times (Only)’ be z. Given that: 40 + 20 +x +y = 100 =>x+y = 40 ---- (i) 70 + 20 +x+z = 150 =>x+z = 60 ----(ii) 100 + 20 +y+z = 200 =>y+z = 80 -----(iii) Adding eq. (i), (ii) and (iii), we get 2 (x+y+z) = 180 x+y+x = 90 ----(iv) Now, subtracting (iv) by (i), we get z= 50 Now, subtracting (iv) by (ii), we get y= 30 Now, by subtracting (iv) by (iii), we get X=10 Total number of males =5/8 of 40 + 7/10 of 70 + 11/20 of 100 + 4/5 of 10 + 7/15 of 30 +2/5 of 50+ 3/4 of 20 Total number of females = 320 - 186 = 134 Required difference = 186 – 134 = 52
A container holds 'x' liters of a mixture composed of liquids A and B in a 5:2 ratio. If 25% of this mixture is removed and then 6 liters of liquid B ar...
In a container containing 120 liters of pure petrol, 40 liters of petrol are drawn and replaced with the same quantity of diesel. This process is repeat...
400 litres of mixture X contains acetone and glycerine in the ratio 11:14, respectively. 100 litres of the mixture is withdrawn and labelled as mixture ...
Rice at Rs 80/kg is mixed with rice at Rs.40/ kg in a certain ratio such that by selling the mixture at Rs.60/ kg profit of 20% is made. If the quantity...
A container holds 80 litres of a solution which has milk and water in the ratio 3:2. 40 litres of this solution is taken out, and then 10 litres of wate...
A container holds a 512 ml mixture of milk and water in a 9:7 ratio. If 'x' ml of water and (x + 36) ml of milk are added, the new ratio of milk to wate...
In a mixture of milk & water, 60 litres water is mixed due to which ratio changes from 3 : 4 to 1 : 2. Find initial quantity of mixture. (in litres)
A container contains 60 liters of a solution containing 25% alcohol. How many liters of pure alcohol must be added to make the alcohol concentration 40%?
In a container, the ratio of milk to water is 9:7. If 32 litres of water is added, the quantities of milk and water become equal. What is the total quan...