Rupinder

**Solution:**

**Concept:**When any two or more quantities are given in the form of ratio then the actual distribution value is calculated as follows:

Let us suppose the quantity A and B in a mixture of *x* quantity is in the ratio then the amount of A is obtained equal to and the amount of B is obtained equal to .

**Calculation:**

**Step:1 **The ratio of boys to girls is and the total number of students is 25.

**Step:2 **Then by the concept, the number of boys in the class is calculated as follows:

**Step:3 **Similarly, the number of girls in the class is calculated as follows:

Hence, the number of boys are 15 and number of girls are 10, in a class of 25 students.

**Answer:**There are 15 boys and 10 girls in a class of 25 students.

** **

**Similar Problems:**

**Problem 1:**If 15 toffees are distributive to two children in the ratio then how many toffees does each one get?

**Solution:**

**Step:1 **The ratio of toffees distributed to two children is and the total number of toffees is 25.

**Step:2 **Then by the concept, the number of toffeesfirst child receives is calculated as follows:

**Step:3 **Similarly, the number of toffees second child receives is calculated as follows:

Hence, the first one gets 5 toffees and the second gets 10 toffees.

**Answer:**The first one gets 5 toffees and the second gets 10 toffees.

** **

**Problem 2:**If 12 litres of milk water mixturecontains milk and water in the ratio then how much amount of milk is present in the mixture?

**Solution:**

**Step:1 **The ratio of milk and water in the mixture of 12 litresis .

**Step:2 **Then by the concept, the amount of milk is calculated as follows:

Hence, the amount of milk present in the mixture is 7 litres.

**Answer:** The mixture contains 7 litres of milk.

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