Question

Ques. 5
In a class, the average age of 30 boys is 13 years and the average of 20 girls is 12 years. What is the average age of the
whole class?
a) 12.5 years
b) 12.6 years
113 years
12 years

Answer 1

Answer:

12.6

Step-by-step explanation:

Total no.of students =50

Sum of their averages = 30x13 + 20x12

                                  = 630

Average of whole class = 630/50

                                    = 12.6yrs