Answer:
There are 30 students in class
Step-by-step explanation:
Let x be the total number of students
Then according to the given statement,
40% of x is 12
this can be expressed mathematically as:
[tex]12 = 40\%\ of\ x\\12 = 0.40 * x[/tex]
we can simply use this equation to find the total number of students
[tex]12 = 0.40x[/tex]
Dividing both sides by 0.40
[tex]\frac{0.40x}{0.40} = \frac{12}{0.40}\\x = 30[/tex]
Hence,
There are 30 students in class
