Last month, Mr. Douglas sold 36 of his books. This month, however, he only sold 8 books. What was the percent change in book sal
2 answers:
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Answer:
Step-by-step explanation:
Let represent students playing basketball,
represent students playing baseball.
Then, ,
Let be the total number of students. So,
.
Now,
3 students play neither of the sport. So, students playing either of the two sports is given as:
∴
From the probability addition theorem,
Where, is the probability that a student chosen randomly from the class plays both basketball and baseball.
Plug in all the values and solve for . This gives,
Therefore, the probability that a student chosen randomly from the class plays both basketball and baseball is