A box contains four blue balls and six red balls. if a ball is selected at random, what is the probability of selecting a blue ball?

40%

Step by step explanation is given above.

You can jst equate themas follows
12 ounces of chocolate = 3 tablespoons
72 ounces of chocolate = x tablespoons
Cross multiply from this sttep. It will become
12x= 72 multiplied by 3
12x = 216
Divide both sides by 12
12x/12 = 216/12
x = 18
You will need 18 tablespoons of cocoa to make 72 ounces of hot chocolate