Part IV . A study used 100 subjects. The table below shows the racial group and
ID: 3293111 • Letter: P
Question
Part IV. A study used 100 subjects. The table below shows the racial group and the home county for each subject.
Queens
Nassau
Brooklyn
White
2
5
25
Black
30
2
2
Asian
20
10
4
[For questions 28-35] If one of these 100 subjects is randomly selected, find the number that is closest to the probability that the person chosen:
28. lives in Brooklyn
0.32
0.25
0.31
29. is Asian
a) 0.31
b) 0.34
c) 0.52
30. is White OR lives in Brooklyn
a) 0.25
b) 0.30
c) 0.38
31. is White AND lives in Brooklyn
a) 0.25
b) 0.30
c) 0.38
32. does NOT live in Nassau
a) 0.17
b) 0.70
c) 0.83
33. lives in Nassau AND lives in Queens
a) 0%
b) 69%
c) 83%
34. lives in Nassau OR lives in Queens
a) 100%
b) 69%
c) 83%
35. lives in Brooklyn, GIVEN the person is White
a) 81%
b) 78%
c) 50%
Part V.
A bag contains 3 red and 4 blue blocks. One block is selected at random. What is the (closest) probability that a red block is picked?
a. 7%
b. 34%
c. 43%
Two coins fall to the floor. The probability that the coins both land heads up is
a. 0.25
b. 0.5
c. 0.75
Queens
Nassau
Brooklyn
White
2
5
25
Black
30
2
2
Asian
20
10
4
Explanation / Answer
q28) Lives in Brooklyn = 31/100 = 0.31
Option C is Correct
Q29) is Asian = 34/100 =0.34
Option B is Correct
Q30 is White OR lives in Brooklyn = 38/100 =0.38
Option C is Correct
Q31) is White AND lives in Brooklyn =25/100 =0.25
Option A is Correct