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41. q-image

The pie chart above shows the statistical distribution of 80 students in five subjects in an examination. Calculate how many students offer Mathematics.

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A.

40

B.

50

C.

12

D.

30


42.
Find the mean of t + 2, 2t – 4, 3t + 2 and 2t.
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A.
2t
B.
2t + 1
C.
t
D.
t + 1

43.
The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 and 18, find the mode.
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A.
8
B.
14
C.
2
D.
6

44.
Age 20 25 30 35 40 45
No. of people 3 5 1 1 2 3

Calculate the median age of the frequency distribution in the table above.

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A.

30

B.

35

C.

20

D.

25


45.

If the variance of 3 + x, 6, 4, x and 7 – x is 4 and the mean is 5, find the standard deviation.

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A.

2

B.

3

C.

2

D.

3


46.
Score 3 4 5 6 7 8 9 10
Freq. 1 0 7 5 2 3 1 1

The table above shows the scores of 20 students in Further Mathematics test. What is the range of the distribution?

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A.

6

B.

3

C.

10

D.

7


47.
In how many ways can a student select 2 subjects from 5 subjects?
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A.

5!2!2!

B.

5!2!3!

C.

5!2!

D.

5!3!


48.

In how many ways can 3 seats be occupied if 5 people are willing to sit?

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A.

20

B.

5

C.

120

D.

60


49.

What is the probability that an integer x (1 ≤ x ≤ 25) chosen at random is divisible by both 2 and 3?

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A.

15

B.

125

C.

34

D.

125


50.

A basket contains 9 apples, 8 bananas and 7 oranges. A fruit is picked from the basket, find the probability that it is neither an apple nor an orange.

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A.

18

B.

724

C.

23

D.

38


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