Question
The average age of 35 children and their teacher's age
are 20 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?Solution
Sum of the age of total children = 36 × 20 = 720 Sum of the age of children after excluding teacher = 35 × 19 = 665 Teacher’s age = 720 – 665 = 55 years
In a total 80-liter mixture of milk and water, there is 25% milk. How many liters of water should be added so that the quantity of milk in the mixture b...
A milkman mixed milk and water in an empty container in the ratio 14:9. The quantity of milk mixed was bought by the milkman at the rate of Rs. 25/litre...
In a mixture, the milk and water are in the ratio 9:2. When 44 liters of the mixture is replaced with 20 liters of water, the ratio becomes 9:4. Find t...
Quantity of water in a 350 litres mixture (Milk + Water) is 50 litres less than the quantity of milk in it. Find the quantity of water to be mixed so th...
- 360 litres of mixture 'P' has milk and water in the ratio 4:1, and 240 litres of mixture 'Q' has them in the ratio 5:3. What is the ratio of milk to water ...
(X + 140) liters of mixture A contains milk and water only such that quantity of water in it is (X – 100) liters less than quantity of milk in it. 75%...
A mixture contains liquid A and liquid B in the ratio of 5:3, respectively. If 12L of liquid B is added to this mixture, the respective ratio of liquid ...
In a 120-litre chemical mixture, the chemicals A and B are in the ratio 5:7. How much of chemical A must be added to make the ratio 7:7 (i.e., equal amo...
A vessel contains 200 litres of milk and water in the ratio of 5:3. If 10 litres of milk is added to the mixture, then find the ratio of milk to water i...
A mixture contains 30 ml water and rest ‘x’ ml milk. When 0.6x ml of water is added to the mixture, the quantity of water becomes 2/5th of the mixtu...
