If the ratio of boys to girls is   and there are 25 students in a class, how do you make equal ratios to show how many students in the class are boys and how many are girls?

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Answer


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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