Mathematics, 13.03.2020 05:04 akai971
A group of college DJs surveyed students to find out what music to plan for their upcoming parties. Thirty percent of the students preferred dubstep, 25% of the students liked trance music, and 20% wanted to hear only house music. Fifteen percent of the respondents selected both dubstep and trance.
A - The proportion of students that like trance music but not dubstep is:
a) 20% .
b) 5% .
c) 10% .
d) 15%B - The proportion of students that like either dubstep or trance is:
a) 40% .
b) 100% .
c) 55% .
d) 70% .
C - The proportion of students that like neither trance music nor dubstep is:
a)60% .
b) 20% .
c) 0% .
d) 40% .
D - The proportion of students that didn’t select any of the music options available on the survey was:
a) 0% .
b) 40% .
c) 20% .
d) 60% .
E - The proportion of students that preferred either dubstep or trance is calculated by:
a) P(A)+P(B)+P(A and B) .
b) None of the answer options are correct.
c) P(A)+P(B) .
d) P(A)+P(B)?P(A and B) .
F - The conditional probability that a student likes dubstep, given that he or she likes trance music, is:
a) 70% .
b) 65% .
c) 60% .
d) 55% .
Answers: 1
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A group of college DJs surveyed students to find out what music to plan for their upcoming parties....
Mathematics, 30.07.2019 02:00