Using it's concept, it is found that the probability that the next box he buys will have a prize is given by:
C. [tex]\frac{2}{5}[/tex].
What is a probability?
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, out of 50 rolls, 20 resulted in a multiple of 3(prize), hence the probability is given by:
[tex]p = \frac{20}{50} = \frac{2}{5}[/tex]
Which means that option C is correct.
More can be learned about probabilities at https://brainly.com/question/14398287
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