Answer:

42 students

Step-by-step explanation:

Given ,

The ratio of boys and girls in the class is 9:5

Let the number of boys be = 9x

number of girls = 5x

the number of boys is 12 more than the number of girls.

Number of boys = 12 + 5x

9x = 12 + 5x

9x - 5x = 12

4x = 12

x = 12/4

x = 3

Hence,

Number of boys = 9x = 9(3) = 27

number of girls = 5x = 5(3) = 15

Total strength of the class = 27 + 15

= 42 students

Therefore, the strength of the class is 42 students

Verified answer

ANSWER

Total strength of class =42

Step-by-step explanation:

Let total no. of boys be 9x and girls be 5x.

Given that boys are 12 more than girls.

So, 9x= 5x+12

9x-5x =12

4x=12

x=3

Total boys= 9x = 9×3= 27

Total girls = 5x = 5×3=15

Total strength of class = Total no. of boys + Total no. of girls

=27+15

=42