Question

A class has 30 boys and 20 girls. The average age of

boys is 12 yrs and girls 12 yrs. What is the
average age of the whole class."​

Answer 1

class has 30 boys and 20 girls

the average age of boys is 12yr and girls 12yr

whole age of class is 12 + 12 ÷2

= 24÷2

= 12

Explanation:

so the average of whole class is 12