MATHS QUESTIONS AND ANSWERS (1)
The mean age of nine students in a class is 14. But when the ages of the teacher is added, the mean becomes 15.2 How old is the teacher? A. 24 B. 26 C. 28 D. 30
Score | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
No. of Students | 12 | 15 | 10 | 3 | 7 | 5 | 2 |
From the table above, the median score is __________ A. 3 B. 2.5 C. 2 D. 1.5
The mode of a grouped data can be gotten from A. pie chart B. bar chart C. histogram D. O give
Class Interval | 1-10 | 11-20 | 21-30 | 31-40 | 41-50 | 51-60 |
Freq. | 7 | 5 | 10 | 2 | 8 | 4 |
If
The median of the above data is ______ A. 26.5 B. 26.0 C. 25.5 D. 27.0
The mode of the above data is _______ A. 23.75 B. 24.35 C. 25.15 D. 26.05
If two fair dice are tossed together, the probability that two odd numbers will appear is ______ A.
A sac contains 7 blue balls, 3 white balls and 6 yellow balls. If two balls are taken from the sac one after the other without replacement. Find the probability that they are of the same colour. A.
In a football match between team X and team Y, the probability of team X winning is
The probabilities of three different hunters hitting their target are
If three coins are tossed together at once, the probability of obtaining two heads and a tail is _______ A.
A basket contains some Oranges and Apples. The probability of picking an Orange is
The pie-chart above shows the income of a tutorial centre based on students who register for examination for the year 2020. If the centre made ₦240,000 from those that registered for JAMB. How much was made from those who registered for NECO? A. ₦540,000 B. ₦520,000 C. ₦480,000 D. ₦450,000
The histogram above shows the score of some students in a test. If the pass mark is 4, the percentage of the students that fail the test is ______ A. 58% B. 42% C. 67% D. 33%Find the standard deviation of
Find the range of
If the standard deviation of a set of numbers is 4. Its variance will be A. 2 B. 4 C. 8 D. 16
The formula for finding semi-interquartile range is A.
Find the mean deviation of
Age (years) | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
No. of students | 3 | 12 | 21 | 16 | 4 | 3 | 1 |
The table above shows the ages of some students at ODEYOURS TUTORIALS. If a student is chosen for the post of a class rep. find the probability that he is 18 and above. A.
ANSWERS
1. B
2. D
3. C
4. B
5. A
6. B
7. B
8. A
9. C
10. D
11. C
12. D
13. A
14. A
15. C
16. C
17. D
18. D
19. B
20. A
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