Question

Ages of students 17,18,19,20,21,22

Number of students 2x,3x,4x-1,x,x-2,x-3.
The table above shows ages of 42 students in a class.
find the value of x​

Answer 1

x=4

Explanation:

total number of students=42

2x+3x+4x-1+x+x-2+x-3=42

12x-6=42

12x=42+6

12x=48

x=48/12

x=4