21,241.
A.
o
B.
2.5
C.
3
D.
5
E.
7
Correct answer is C
There are 20 students. Hence, the median is found by the average of the 10th and 11th score.
= \(\frac{3 + 3}{2}\)
= 3
21,242.
A.
1.75
B.
2
C.
2.5
D.
2.75
E.
3
Correct answer is D
| Score | 0 | 1 | 2 | 3 | 4 | 5 | Total |
| Freq | 2 | 3 | 4 | 2 | 7 | 2 | 20 |
| \(fx\) | 0 | 3 | 8 | 6 | 28 | 10 | 55 |
\(\bar{x} = \frac{\sum fx}{\sum f}\)
= \(\frac{55}{20}\)
= \(2.75\)
21,243.
A.
2
B.
3
C.
4
D.
5
E.
7
Correct answer is C
The mode=4. It has the highest frequency of 7
21,244.
Find the 8th term of the A.P -3, -1, 1 ......
A.
13
B.
11
C.
-8
D.
-11
E.
-17
Correct answer is B
Un = a + (n-1)d
= -3 + (8 - 1)2
= 11
21,245.
Simplify 36\(^\frac{1}{2}\) x 64\(-^\frac{1}{3}\) x 5\(^0\)
A.
0
B.
1\24
C.
2/3
D.
11/2
E.
71/2
Correct answer is D
36\(^\frac{1}{2}\) x 64\(-^\frac{1}{3}\) x 5\(^0\)
= \(6 \times \frac{1}{4} \times 1\)
= \(1\frac{1}{2}\)
WAEC Subjects
Aptitude Tests