SOLUTION: Adults and high school students were asked four trivia questions. The number of correct answers given by each participant was recorded.
What is the probability that a randomly se
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What is the probability that a randomly se
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Question 549259: Adults and high school students were asked four trivia questions. The number of correct answers given by each participant was recorded.
What is the probability that a randomly selected participant is an adult or had no correct answers?
# of Correct Answers Total
0 1 2 3 4
Adults 16 40 41 38 39 174
Students 45 12 9 54 48 168
Total 61 52 50 92 87 342 Answer by mathie123(224) (Show Source):
You can put this solution on YOUR website! Let's first find the probability that a randomly selected participant is an adult:
there are a total of 174 adults out of a total of 342 people.
This means that the probability that a randomly selected participant is an adult is
Similarily the probability that a person had no correct answers is the total number of students who answered 0 correct divided by the total number of people which is
Since we are looking for the proabbility that a randomly selected particiapnt is an adult OR had no correct answers, we can use the sum rule to get:
.Hopefully this helps a bit let em know if you are unsure about anything:)
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