Jambmaths

Maths Question

Question 41

No	1	2	3	4	5	6
Frequency	30	43	54	40	41	32

A dice is rolled 240 times and the result depicted in the table above. If a pie chart is constructed to represent the data, the angle corresponding to 4 is

Question 42

Interval(Years)	10–12	13–15	16–18	19– 20	21–23
No of Pupils	6	14	15	10	32

The table above shows the frequency distribution of ages (in years) of pupils in a certain secondary, what percentage of the total number of pupils is over 15 but less than 21 years

Question 43

Interval(Years)	10–12	13–15	16–18	19– 20	21–23
No of Pupils	6	14	15	10	32

The table above shows the frequency distribution of ages (in years) of pupils in a certain secondary

The cumulative frequency curve above represent the ages of students in a school which age group do 70% of the students belong

Question 44

Find the sum of the range and mode of the set of numbers 10,5, 10, 9,8, 7,7,10, 8,10, 8,4, 6,9,10,9,10,9,7,10,6,5.

Question 45

If the mean of number 0, x, x + 2, 3x + 6, and 4x + 8 is 4. Find the mean deviation

Question 46

The variance of x, 2x, 3x, 4x and 5x is

Question 44

The graph above shows the cumulative frequency of the distribution of Masses of fertilizer for 48 workers in one institution. Which of the following gives interquartile range.

Question 45

The histogram above shows the distribution of passengers in taxis of a certain motor park. How many taxis have more than 4 passengers?

Question 47

Find the variance of 2,6,8,6,2 and 6

Question 48

The bar chart above shows different colours of cars passing a particular point on a certain street in two minutes. What fraction of the total number is yellow.

Question 50

Find the range ${\scriptstyle{}^{1}\!\!\diagup\!\!{}_{6}\;},{\scriptstyle{}^{1}\!\!\diagup\!\!{}_{3}\;},{\scriptstyle{}^{3}\!\!\diagup\!\!{}_{2}\;},{\scriptstyle{}^{8}\!\!\diagup\!\!{}_{9}\;}\text{ and }{\scriptstyle{}^{4}\!\!\diagup\!\!{}_{3}\;}$

Question 42

Find the mean of the data 7, –3, 4, –2, 5, –9, 4, 8, –6, 12,

Question 44

The range of the data k + 2, k – 3, k + 4, k – 2, k, k – 5, k + 3, k – 1 and k + 6

Question 46

The acre for rice, pineapple, cassava, cocoa and palm oil in a certain district are given respectively as 2, 5, 3, 11 and 9. What is the angle of the sector for cassava in a pie chart

Question 48

The mean of a set six number is 60. If the mean of the first five is 50. Find the sixth number in the set.

Question 49

Calculate the mean deviation of the set of numbers 7, 3, 14, 9, 7, and 8

Question 50

No of days	1	2	3	4	5	6
No of students	20	x	50	40	2x	60

The distribution above shows the number of daysa group of 260 students were absent from school in a particular term. How many students were absent for at least four days in the term?

Question 40

By how much is the mean of 30, 56, 31, 55, 43, and 44 less than the median?

Question 41

The range of 4, 3 11, 9, 6, 15, 19, 23, 27, 24, 21 and 16 is

Question 42

Value	0	1	2	3	4
Frequency	1	2	2	1	9

Find the mean of the distribution above

Question 43

On a pie chart, there are four sector of which three angles are 45^o, 90^o, and 135^o. If the smallest sector represent N28.00. How much is the largest sector.

Question 47

The mean of the numbers 3, 6, 4,x, and 7 is 5. Find the standard deviation.

Question 48

Question 49

The histogram above shows the ages of the victims of pollution. How many people were involved in the pollution?

Question 50

Number	1	2	3	4	5	6
Frequency	12	20	x	21	x – 1	28

The result of tossing a fair die 120 times is summarized above. Find the value of x

Question 19

Find the mean deviation of 1, 2, 3 and 4

Question 21

The pie chart above the distribution of the crops harvested from a farmland in al year. If 3000 tonnes of millet is harvested, what amount of beans is harvested?

Question 23

The mean age of a group of students is 15 years. When the age of a teacher is 45years old is added to the ages of the students, the mean of their ages becomes 18 years. Find the number of students in the group.

Question 26

The weight of 10 pupils in a class are 15kg, 16kg, 17kg, 18kg, 16kg, 17kg, 17kg, 17kg,18kg and 16kg. What is the range of this distribution?

Question 27

I.   Rectangular bars of equal width
II.   The height of each rectangular bar is proportional to the frequency of the corresponding class interval
III.   Rectangular bar have common sides with no gaps in between
A histogram is described completely by

Question 31

Scores	1	2	3	4	5	6
No of students	1	4	5	6	x	2

The table above shows the score of a group of students in a test. If the average is 3.5, find the value of x

Question 33

Find the value of t if the standard deviation of 2t, 3t, 4t, 5t, and 6t is $\sqrt{2}$

Question 34

The grade of 36 students in a test shown in the pie chart . How many students had excellent?

Question 36

The modal height and range of height

1.35, 1.25, 1.35,. 1.25, 1.40, 1.35, 1.45, 1.50, 1.35, 1.50 and 1.20 are m and r respectively. Find m + 2r

Question 38

The histogram above shows the distribution of the monthly income of the workers in a company. How many workers earn more than N700.00?

Question 17

Score	1	2	3	4	5	6	7	8
Frequency	2	3	5	12	10	6	4	1

The table above shows the score of a group of students in a physics test. If the mode is m and the number of students who scored 4 or more is n. What is (n, m)?

Question 19

The response of 160 pupils in a school asked to indicate their favorite subjects is given in the bar chart above. What percentage of the pupils has English and Health Education as their favorite subjects?

Question 22

The pie chart above show the expenditure of a family whose income sN30,000, if the expenditure on food is twice that on housing and that school fee is twice that on transport, how much the family spends on food?

Question 23

Find the variance 2x, 2x – 1 and 2x + 1

Question 24

If the mean of five consecutive numbers integer is 30. Find the largest of the number

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