Concept explainers
To Calculate: The probability that J selects two B-level problems has to be calculated

Answer to Problem 40RP
The probability that J selects two B-level problems is
Explanation of Solution
Given information: The following information about the number of problems is provided
Two C level problems
Five B level problems
One A level problem
Formula used: We use the basic formula for probability
Calculation: Here, we have:
Number of favorable outcomes
Total number of outcomes
Thus, putting these values in the equation of probability, we get
Thus, the final answer is
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