Red cubes

There are 15 white and several red cubes in the box. The probability of accidentally pulling out a white cube is 20%. How many red cubes are in the box?

Correct answer:

c =  60

Step-by-step explanation:

p=20%=10020​=51​=0.2  p = 15 / (15+c)  p⋅ (15+c)=15 0.2⋅ (15+c)=15  0.2c=12  c=0.212​=60  c=60

Try another example


Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.
Our percentage calculator will help you quickly and easily solve a variety of common percentage-related problems.
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Grade of the word problem:

Related math problems and questions: