So girls make up 1/3 of group, while boys make up 2/3.
1/3 *40 = 13. 3 rounded to 13
40 - 13 = 27
Do you have typos?
Question: total of 40 students in class, boys number is double of the girls number. How many boys & girls in the class?
Working as follow:
a = boy b = girl
2a + b = 40
2a + 2a = 40
4a =40
a =10
b=2a
b = 2x 10
b = 20
So a=10, b= 20. Total only 30, not 40 . Why?
Thanks
1 answer