Question

The average age of 12 boys and 18 girls in a class are 16 years and 15 years respectively.
Calculate the average age of the students in the class

Answer 1

Answer:

15.4 year

Step-by-step explanation:

Average = sum / number

*of quantities

For boys:

= > 16 = (sum of age of boys)/12

= > 16*12 = 192 = sum of age of boys

Similarly, for girls,

= > 15 = (sum of age of girls)/18

= > 15*18 = 270 = sum of age of girls

Average age of whole class:

= > (sum of ages of boys + sum of ages of girls)/( total students )

= > ( 192 + 270 )/( 12 + 18 )

= > 462/30

= > 15.4