Question 14 Marks
Answer
View full question & answer→1. (b) 2. (a) 3. (b) 4. (b)
Questions
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18 questions · timed · auto-graded
Question 24 Marks
In India, the Census is held every 10 years to count the whole population of the country. In a particular Census, the data of the number of children in 25 families of a village was provided as :
1, 2, 4, 2, 0, 2, 3, 3, 1, 0, 2, 3, 4, 3, 1, 1, 2, 1, 2, 3, 2, 4, 1, 2, 2.
Rahul works in the analytics department of the Census. He was given the task of analysing this data of the 25 families of this village.
Q.1. How many families have 3 children?
(a) 2 $\quad$$\quad$(b) 3$\quad$$\quad$ (c) 5$\quad$$\quad$ (d) 6
Q.2. The cumulative frequency of families having 3 children is :
(a) 13$\quad$$\quad$(b) 17$\quad$$\quad$ (c) 18$\quad$$\quad$ (d) 22
Q.3. The mean number of children in these 25 families is :
(a) 1.96 $\quad$$\quad$(b) 2.04$\quad$$\quad$ (c) 2.85$\quad$$\quad$ (d) 3.15
Q.4. The median of the number of children in these 25 families is :
(a) 1 $\quad$$\quad$(b) 2 $\quad$$\quad$(c) 3$\quad$$\quad$ (d) 4
1, 2, 4, 2, 0, 2, 3, 3, 1, 0, 2, 3, 4, 3, 1, 1, 2, 1, 2, 3, 2, 4, 1, 2, 2.
Rahul works in the analytics department of the Census. He was given the task of analysing this data of the 25 families of this village.
Q.1. How many families have 3 children?
(a) 2 $\quad$$\quad$(b) 3$\quad$$\quad$ (c) 5$\quad$$\quad$ (d) 6
Q.2. The cumulative frequency of families having 3 children is :
(a) 13$\quad$$\quad$(b) 17$\quad$$\quad$ (c) 18$\quad$$\quad$ (d) 22
Q.3. The mean number of children in these 25 families is :
(a) 1.96 $\quad$$\quad$(b) 2.04$\quad$$\quad$ (c) 2.85$\quad$$\quad$ (d) 3.15
Q.4. The median of the number of children in these 25 families is :
(a) 1 $\quad$$\quad$(b) 2 $\quad$$\quad$(c) 3$\quad$$\quad$ (d) 4
Answer
View full question & answer→1. (c) 2. (d) 3. (b) 4. (b)
Question 34 Marks
Read the bar graph given below :
Answer the following questions :
(i) What information is given by the bar graph?
(ii) What was the wheat production in 2010?
(iii) In which year the production was minimum?
(iv) In which year there was maximum increase in production of wheat?
Answer the following questions :
(i) What information is given by the bar graph?
(ii) What was the wheat production in 2010?
(iii) In which year the production was minimum?
(iv) In which year there was maximum increase in production of wheat?
Answer
View full question & answer→(i) Quantity of wheat produced (in million tons, i.e., in MT) by a state in various years from 2008 to 2013.
(ii) 85 MT
(iii) 2009
(iv) 2012
(ii) 85 MT
(iii) 2009
(iv) 2012
Question 44 Marks
Read the given bar graph and answer the questions that follow :
(i) What information is represented by the bar graph?
(ii) How many marks were obtained in English?
(iii) In which subject least marks were obtained?
(iv) What was the total marks obtained in all the subjects together?
(i) What information is represented by the bar graph?
(ii) How many marks were obtained in English?
(iii) In which subject least marks were obtained?
(iv) What was the total marks obtained in all the subjects together?
Answer
View full question & answer→(i) Marks obtained by a student in various subjects in an examination
(ii) 65
(iii) Hindi
(iv) 455
(ii) 65
(iii) Hindi
(iv) 455
Question 54 Marks
The air distances of four cities from Delhi (in km) are given below :
Draw a bar graph to represent the above data.
| City | Kolkata | Chennai | Mumbai | Hyderabad |
| Distance from Delhi (in km) | 1340 | 1700 | 1100 | 1220 |
Answer
View full question & answer→self
Question 64 Marks
The birth-rate per thousand of five countries over a period of time is shown below :
Represent the above data by a bar graph.
| Country | China | India | Germany | U.K. | Sweden |
| Birth-rate per thousand | 42 | 35 | 14 | 28 | 21 |
Answer
View full question & answer→[Hint. Along y-axis, take 1 cm = 7 infants.]
Question 74 Marks
The marks obtained by a student in his annual examination in various subjects are given below :
Represent the above data by a bar graph.
| Subject | Hindi | Mathematics | English | Science | S.Studies |
| Marks obtained | 64 | 40 | 52 | 80 | 36 |
Answer
View full question & answer→self
Question 84 Marks
The following table shows the favourite sports of 250 students in a school :
Represent the above data by a column graph.
| Sports | Cricket | Football | Tennis | Badminton | Swimming |
| Number of students | 75 | 35 | 50 | 25 | 65 |
Answer
View full question & answer→self
Question 94 Marks
The following table gives the weights (in grams) of 30 boxes of fruits :
Find the mean and the median.
Using empirical formula, calculate its mode.
| Weight (in grams) | 350 | 425 | 500 | 375 | 475 | 400 | 450 |
| Number of boxes | 5 | 3 | 6 | 4 | 2 | 3 | 7 |
Using empirical formula, calculate its mode.
Answer
View full question & answer→427.5 g, 425 g, 420 g
Question 104 Marks
The marks (out of 10) obtained by 35 students of a class are given in the following table :
Find the mean and the median.
Using empirical formula, calculate its mode.
Find the mean and the median.
| Marks obtained | 7 | 1 | 10 | 2 | 8 | 6 | 4 | 5 | 9 | 3 |
| Number of students | 7 | 0 | 2 | 0 | 1 | 9 | 6 | 4 | 5 | 1 |
Answer
View full question & answer→6.37, 6, 5.26
Question 114 Marks
The following table shows the heights of 50 students of a class :
Find the mean and the median.
Using empirical formula, calculate its mode.
| Height (in cm) | 152 | 148 | 150 | 153 | 149 | 151 | 147 |
| Number of students | 8 | 3 | 4 | 7 | 12 | 10 | 6 |
Using empirical formula, calculate its mode.
Answer
View full question & answer→150.22, 150.5, 151.06
Question 124 Marks
A shoe store sells pairs of shoes of different sizes. The number of pairs of various sizes sold on a particular day are given below :
What is the modal shoe-size?
| Size of shoes | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Number of pairs sold | 3 | 5 | 1 | 2 | 8 | 2 | 4 | 3 | 5 | 5 | 2 |
Answer
View full question & answer→5
Question 134 Marks
The heights (in cm) of 35 students of a class are given below :
Find the median height.
| Height (in cm) | 157 | 152 | 153 | 154 | 155 | 156 |
| Number of students | 7 | 4 | 3 | 5 | 9 | 7 |
Answer
View full question & answer→155 cm
Question 144 Marks
The daily wages (in ₹) of 100 labourers in a factory are given below :
Find the median wages.
| Daily wages (in ₹) | 360 | 280 | 420 | 320 | 400 | 300 | 380 |
| Number of labourers | 17 | 10 | 18 | 27 | 16 | 8 | 4 |
Answer
View full question & answer→360
Question 154 Marks
If the mean of the following frequency distribution is 15, find the value of p.
| Variable (xi) | 10 | 12 | 14 | 16 | 18 |
| Frequency (fi) | 13 | p | 15 | 32 | 28 |
Answer
View full question & answer→p = 12
Question 164 Marks
Find the mean height of 65 boys from the following data :
| Height (in cm) | 142 | 144 | 146 | 148 | 150 | 152 |
| Number of boys | 10 | 13 | 12 | 7 | 17 | 6 |
Answer
View full question & answer→146.8 cm
Question 174 Marks
The heights (in cm) of 90 plants in a garden are given below :
Find the mean height.
| Height (in cm) | 58 | 60 | 62 | 64 | 66 | 74 |
| Number of plants | 20 | 25 | 15 | 8 | 12 | 10 |
Answer
View full question & answer→62.6 cm
Question 184 Marks
Find the mean weight of 50 boys from the following data :
| Weight (in kg) | 50 | 52 | 54 | 56 | 60 |
| Number of boys (Frequency) | 6 | 8 | 15 | 14 | 7 |
Answer
View full question & answer→54.6 kg