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A student found the approximate value of 0.02548 correct to two places of decimal instead of two significant figures. Find the percentage error.
A0%
B131/3%
C15 5/13%
D2/3%
E20%
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Question 712
waec1997
A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B is 34. How many elements are in A ∩ E?
A105
B27
C15
D12
E7
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Question 713
waec1997
If P = {3, 5, 6} and Q = {4, 5, 6} then P∩Q equals
A{3, 4}
B{4, 5}
C{4, 6}
D{5, 6}
E{3, 5}
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Question 714
waec1997
Express (0.0425 / 2.5) as a fraction
A
17/10,000
B
17/1,000
C
17/250
D
17/100
E
17/10
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Question 715
waec1996
The table gives the distribution of outcomes obtained when a die was rolled 100 times.
What is the experimental probability that it shows at most 4 when rolled again?
A8/25
B12/25
C13/25
D2/3
E17/25
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Question 716
waec1996
A bag contains 3 red, 4 black and 5 green identical balls. Two balls are picked at random, one after the other without replacement. Find the probability that one is red and the other is green
A\(\frac{2}{3}\)
B\(\frac{5}{11}\)
C\(\frac{5}{22}\)
D\(\frac{5}{24}\)
E\(\frac{5}{48}\)
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Question 717
waec1996
What percentage of observation lie outside interquartile range of any distribution?
A121/2%
B25%
C50%
D621/2 %
E75%
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Question 718
waec1996
The marks obtained by pupils of class are grouped as shown below; 0 - 4, 5 - 9,10 -14, 15 -19. Which of the following is/are not true? l. The mid values of the grouped marks are 2, 7, 12 and 17. II The class interval is 4. III The class boundaries are 0.5, 4.5, 9.5, 14.5 and 19.5
AI only
BII only
CIII only
DI and II only
EII and III only
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Question 719
waec1996
The cumulative frequency curve may be used to find the
Avariance
Bstandard deviation
Cmode
Dmedian
Emean
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Question 720
waec1996
The number of goals scored by a football team in 20 matches is shown in the table above
What is the modal goal scored?
Ao
B1
C2
D5
E7
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Question 721
waec1996
The number of goals scored by a football team in 20 matches is shown in the table above
What is the mean goal scored?
A0.75
B1.75
C1.9
D2
E2.15
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Question 722
waec1996
The angle of elevation of the top X of a vertical pole from a point P on a level ground is 60o. The distance from P to the foot of the pole is 55m. Without using tables, find the height of the pole.
A50/3m
B50m
C55√3m
D60m
E65m
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Question 723
waec1996
A town P is 150km from a town Q in the direction 050o. What is the bearing of Q from P?
A050o
B130o
C230o
D270o
E310o
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Question 724
waec1996
If tan x = \(2\frac{2}{5}\), find the value of sin x; 0 \(\leq\) x \(\leq\) 90o
A5/13
B5/12
C144/169
D12/13
E13/12
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Question 725
waec1996
If sin\(\theta\) cos\(\theta\), for 0o \(\leq\) θ \(\leq\) 360o, find the value of \(\theta\)
A45o, 225o
B135o, 315o
C45o, 315o
D135o, 225o
E45o, 135o
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Question 726
waec1996
In the diagram above, AB, CD and XY are straight lines intersecting at W. Find ∠CWX
A20o
B80o
C100o
D120o
E140o
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Question 727
waec1996
The trapezium PQRS parallel to SR,∠PQS = 34o and ∠SPQ = 2 ∠SRQ. Find the size of, SQR
A58o
B68o
C78o
D90o
E112o
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Question 728
waec1996
Two angles (a + 31) and (b - 49o) are adjacent angles on a straight line. Which of the following is true
Aa + b = 198o
Ba + b = 180o
Ca + b = 162o
Da + b = 100o
Ea + b = 80o
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Question 729
waec1996
In the diagram above, ∠SPQ = 79o. Find ∠SRQ
A11o
B391/2
C79o
D90o
E101o
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Question 730
waec1996
In the diagram above, KLMN is a cyclic quadrilateral. /KL/ = /KN/, ∠NKM = 55o and ∠KML = 40o. Find ∠LKM
