The average weight of 18 girls in a class is 56 kg and the average weight of 32 boys in the same class is 62 kg. What is the average weight of all the 50 students
in that class?

59.84 kg

Step-by-step explanation:

Let sum of the weight of girls be x

Let sum of the weight of boys be y

Avg weight of girls =( Sum of the weight of girls) /

number of girls

56kg = (x) /18girls

x = 56×18 =1008kg

Avg weight of boys =(Sum of the weight of boys) /

number of girls

62kg = (y) /32boys

y = 62×32 = 1984kg

To find the average weight of all the 50 students, a similar formula will be used.

Avg weight if all students = (Sum of all the

students) /Total

number of students

Avg weight of all students = (x+y) /50

= (1008+1984) /50

= 59.84 kg

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x