Elan surveyed a random sample of 65 students at his high school. He asked them which subject is their first class on Mondays. There are 894
students in his school.
First Class Percent of Students
English
17%
Math
28%
History
40%
Science
15%
Choose two inferences that can be made from the results.
O A. Approximately 17% of all students in the city have English first on Mondays.
B. Approximately 28% of the students at Elan's school have Math first on Mondays.
C. Approximately 40% of the students at Elan's school do not have History first on Mondays.
OD. Approximately 85% of the students at Elan's school do not have Science first on Mondays.

B and D are correct

Step-by-step explanation:

A isn't correct because the survey wasn't out of students in the city, it was out of people attending Elan's school.

B is correct because the survey said 28% of students at Elan's school have math first on mondays.

C isn't correct because the survey said the exact opposite.

D is correct because only 15% of students at Elan's school have science first on mondays

B and D

TRUST ME

Step-by-step explanation:

853.3

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560