Question 879351: Let’s say 200 students, who are on active military service, signed for this semester.
50 of them registered for Statistics courses, 60 are registered for Psychology courses,
10 students will take Statistics and Psychology courses at the same time.
What is the probability that randomly selected student out of these 200 military students is taking this semester Statistics or Psychology course?
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
Since 60 students are taking Psychology, and 10 are taking both Stat and Psychology, there must be 50 who are ONLY taking Psychology. Using similar logic, 40 are ONLY taking Statistics. Therefore 40 plus 50 plus 10 = 100 are taking one or the other (or both), hence a random selection of the 200 has a 50% chance of being one of those taking Stat or Psych
John
My calculator said it, I believe it, that settles it
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