If in a stick of chalk, carbon is 3 g, what is the weight of the chalk stick?

Let us assume the weight of the stick be x g

Also, weight of carbon = 3 g

Therefore,

According to question:

12 % of x = 3

Hence,

× x = 3

x = 3 ×

= 25 g

Thus, the weight of chalk stick is 25 g