1997 - WAEC Mathematics Past Questions and Answers - page 5
41
The graph is the cumulative frequency curve for the weight distribution of 100 workers in a factory. Which of the points P,Q,R,S and T indicates the median weight?
A
T
B
S
C
R
D
Q
correct option: d
Users' Answers & Comments42
A bag contains red, black and green identical balls. A ball is picked and replaced. The table shows the result of 100 trials. Find the experimental probability of picking a green ball.
A
16
B
21/25
C
1/3
D
4/21
43
The table shows the scores of a group of students in a test. If the average score is 3.5, find the value of x
A
1
B
2
C
3
D
4
correct option: b
1 + 8 + 15 + 24 + 12 + x/18 + x = 3.5
120 + 10x = 126 + 7x
3x = 6
x = 2
120 + 10x = 126 + 7x
3x = 6
x = 2
44
What is the probability of having an odd number in a single throw of a fair die with the faces numbered 1,2,3,4,5,6?
A
5/6
B
2/3
C
1/2
D
1/3
45
A bag contains 3 white, 6 red, 5 blue identical balls. A ball is picked at random from bag. What is the probability that is either white or blue?
A
9/14
B
4/7
C
3/7
D
5/14