Question

b)In a class of 60 students, the number of girls is one third the number of boys. Find the number of girls and boys in the class.​

Answer 1

Answer:

ᴛᴏᴛᴀʟ sᴛᴜᴅᴇɴᴛs= 60

ʟᴇᴛ ɴᴏ.ᴏғ ʙᴏʏs ʙᴇ x

ʟᴇᴛ ɴᴏ.ᴏғ ʙᴏʏs ʙᴇ x ᴛʜᴇɴ ɢɪʀʟs ɪɴ ᴛʜᴇ ᴄʟᴀss ᴡɪʟʟ ʙᴇ 1/3 ᴏғ x

x+ x/3= 60

3x+x/3= 60

4x/3= 60

x= 60 x 3/ 4

x= 15 x 3

x= 45 ʙᴏʏs

ɢɪʀʟs ɪɴ ᴄʟᴀss = x/3= 45/3= 15 ɢɪʀʟs