39
41.
The grades of 36 students in a class test are
as shown in the pie chart above. How many
students have excellent.
A.
12
B. 9
C. 8
D. 7
42.
The bar chart above shows the distribution
of marks in a
class test. If the pass mark is 5,
what percentage of students failed the
test.
A.
10%
B. 20%
C. 50%
D.
60%
43.
The mean of seven numbers is 96. If an
eighth number is added, the mean becomes
112. Find the eighth number.
A.
126
B. 180
C. 216
D. 224
44.
Find the median of 2, 3, 7, 3, 4, 5, 8, 9, 9, 4,
5, 3, 4, 2, 4 and 5.
A.
9
B. 8
C. 7
D.
4
45.
Find the range of 4, 9, 6, 3, 2, 8, 10 and 11.
A.
11
B. 9
C. 8
D. 4
46.
Find the standard deviation of 2, 3, 8, 10
and 12
A.
3.9
B. 4.9
C. 5.9
D.
6.9
47.
Evaluate
n+1
C
n
-
2
if n = 15.
A.
3630
B. 3360
C. 1120
D. 560
48.
In how many ways can the letters of the
word TOTALITY be arrange
d.
A.
6720
B.
6270
C.
6207
D. 6027
49.
The probability that a student passes a
physics test is
.
3
2
If he takes three physics
tests, what is the probability that he passes
two of the tests.
A.
9
4
B.
9
6
C.
27
4
D.
27
2