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
Algebra.Com
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:)
RELATED QUESTIONS
A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone... (answered by ewatrrr)
A total of four hundred people attended the local symphony's holiday concert at the civic (answered by josgarithmetic)
The spring concert at a certain high school sold 159 tickets. Students were charged $6... (answered by ikleyn)
i need help.
write a system of equations.
The receipts from 300 tickets for a high (answered by rfer)
Hi,
Please help me to solve step-by-step on these questions.
Thank you very much.
2. (answered by josmiceli)
A total of 290 people attended the highschool play. The admission prices were $11... (answered by ikleyn,greenestamps,Shin123)
A multiple choice trivia quiz has 10 questions, each with 5 possible answers. If someone... (answered by ewatrrr)
On a multiple choice test with 24 questions, each question has four possible answers, one (answered by stanbon)
On a multiple choice test with 7 questions, each question has four possible answers, one... (answered by stanbon)