To find the probability that a randomly chosen student earned a grade of B, we need to use the formula for probability:

$P(\text{B}) = \frac{\text{Number of students who earned B}}{\text{Total number of students}}$

From the data provided, the total number of students who earned a grade of B is 34, and the total number of students in the group is 88.

Thus, the probability is:

$P(\text{B}) = \frac{34}{88}$

Now, we compute this and round it to three decimal places.

$P(\text{B}) \approx \frac{34}{88} \approx 0.386$

So, the probability that a randomly chosen student earned a B is approximately 0.386.

Would you like further details on this calculation or have any other questions?

Here are 5 related questions:

1. What is the probability that a randomly chosen student is male?
2. What is the probability that a randomly chosen student is female and earned a B?
3. What is the probability that a randomly chosen student earned an A?
4. What is the probability that a male student earned a C?
5. What is the probability that a randomly chosen student is either male or earned an A?

Tip: Always express probabilities as ratios of favorable outcomes to total possible outcomes when solving probability questions.