Final answer:
To find the probability of a student preferring 'Reading' or being a 'Tenth grader', use the formula P(Reading or Tenth) = P(Reading) + P(Tenth) - P(Reading and Tenth). This is a common technique in probability to account for the overlap between two events.
Step-by-step explanation:
The question revolves around the concept of probability, specifically the evaluation of the cumulative probability of choosing 'Reading' or being in 'Tenth grade' from a survey given to ninth and tenth graders.
To solve this, you would consider:
- A. The probability of a student preferring Reading.
- B. The probability of a student being in the Tenth grade.
- C. The probability of a student both preferring Reading and being in Tenth grade.
- D. The probability of either event occurring, which is found using the formula P(A or B) = P(A) + P(B) - P(A and B), where A is the event of choosing Reading, and B is the event of being in Tenth grade.
Without concrete numbers, we can't give a definitive answer, but this is the procedure the student would follow to evaluate the probability of a student preferring Reading or being a Tenth grader.