1,386.
Find the probability that a number selected from the number 30 to 50 inclusive is a prime
A.
1/4
B.
5/21
C.
2/7
D.
3/10
E.
1/3
Correct answer is B
30 (31) 32 33 34 35 36 (37) 38 39 40 (41) 42 (43) 44 45 46 (47) 48 49 50
prob = 5/21
1,387.
A.
1/221
B.
1/169
C.
1/52
D.
1/26
E.
1/13
Correct answer is B
1st card prob = 4/52 2nd card prob = 4/52
prob.both are aces = (4/52) x (4/52) = 1/169
1,388.
A.
1.52m
B.
1.53m
C.
1.54m
D.
1.55m
E.
1.56m
Correct answer is C
No explanation has been provided for this answer.
1,389.
The percentage of the students with mass less than 69kg is
A.
56%
B.
62.5%
C.
68%
D.
70%
E.
87.5%
Correct answer is D
No explanation has been provided for this answer.
1,390.
The median of the distribution is
A.
9.5kg
B.
11kg
C.
67kg
D.
65.5kg
E.
68kg
Correct answer is E
\(\frac{67 + 68}{2} = 67.5 = 68kg\)
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