Processing math: 88%

WAEC Mathematics Past Questions & Answers - Page 225

1,121.

Calculate the standard deviation of the following marks; 2, 3, 6, 2, 5, 0, 4, 2

A.

1.5

B.

1.7

C.

1.8

D.

1.9

View answer & explanation

Correct answer is C

x	2	3	6	2	5	0	4	2	24
x - $\bar{x}$	-1	0	3	-1	2	-3	1	-1
$(x - \bar{x})^2$	1	0	9	1	4	9	1	1	26

Mean = $\frac{24}{8} = 3$

Standard deviation = $\sqrt{\frac{26}{8}}$

= $\sqrt{3.25}$

= 1.802 $\approeq$ 1.8

1,122.

The bar chart shows the distribution of marks scored by a group of students in a test. Use the chart to answer the question below
How many students took the test?

A.

38

B.

32

C.

15

D.

11

View answer & explanation

Correct answer is D

2 + 3 + 4 + 5 + 6 + 3 +3 + 0 + 2 + 2 + 2 = 32

1,123.

The bar chart shows the distribution of marks scored by a group of students in a test. Use the chart to answer the question below
How many students scored 4 marks and above?

A.

15

B.

11

C.

10

D.

17

View answer & explanation

Correct answer is D

Students that scored 4 and above = 5 + 3 + 3 + 0 + 2 + 2 + 2

= 17

1,124.

In the diagram, AB is a vertical pole and BC is horizontal. If |AC| = 10m and |BC| = 5m, calculate the angle of depression of C from A

A.

63^o

B.

60^o

C.

45^o

D.

27^o

View answer & explanation

Correct answer is B

In triangle ABC, $\frac{BC}{AC} = \cos \theta$

$\implies \cos \theta = \frac{5}{10} = 0.5$

$\theta = \cos^{-1} (0.5) = 60°$

1,125.

Which of the following bearings is equivalent to S50°W?

A.

040^o

B.

130^o

C.

220^o

D.

230^o

View answer & explanation

Correct answer is D

p>S50°W = 180° + 50°

= 230°

WAEC Subjects

English Language

Agricultural Science

Physical Education

Further Mathematics

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Office Practice

Civic Education

Aptitude Tests

Logical Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

Spatial Reasoning Questions and Answers

Puzzles Questions and Answers

Abstract Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Personality Test

Microsoft Office Questions and Answers

Quantitative Reasoning Questions and Answers

Situational Judgement Questions and Answers

Data Interpretation Questions and Answers

Typing Speed and Accuracy Test

Nigeria General Knowledge Questions and Answers

View latest jobs in Nigeria today