Question

13. The ratio of the number of boys and girls in
a class is 9:5. Find the number of boys if the
total number of students in the class is 42.​

Answer 1

Answer:

Step-by-step explanation:

• Let the no. of girls be 5x
• No. of boys=7x
• According to the question
• 5x+8=7x
• 7x-5x=8
• 2x=8
• x=8/2
• x=4
• No. of girls=5*4=20
• no. of boys=7*4 or 5*4+8=28
• Hence the total strength of the class is 20+28=48

Answer 2

Answer:

27 boys

Step-by-step explanation:

total parts = 9+5= 14

total students in class= 42

value of each part or ratio = 42/14=3

number of boys = 3*9= 27