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Difference Between Mass & Weight With Their Comparisons - BYJU'S

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Unit 2 - Real and Complex Numbers Exercise 2. Unit 3 - Logarithms Exercise 3. Unit 5 - Factorization Exercise 5.

Unit 10 - Congruent Triangles Theorem Unit 11 - Parallelograms and Triangles Theorem Unit 13 - Sides and Angles of Triangles Theorem Unit 15 weighhs Pythagoras' Theorem Theorem Unit 17 - Practical Geometry Triangles Exercise Glossary Glossary.

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So, 2 children view television for 15 hours or more than 15 hours a week. Given are the scores out of 25 of 9 students in a Monday test : 14, 25, 17, 22, 20, 19, 10, 8 and 23 Find the mean score and median score of the data. The scores of an English test out of of 20 students are given below : 75, 69, 88, 55, 95, 88, 73, 64, 75, 98, 88, 95, 90, 95, 88, 44, 59, 67, 88, Ascending order of given data is as given below : 44, 55, 59, 64, 67, 69, 73, 75, 75, 88, 88, 88, 88, 88, 90, 95, 95, 95, 98, Obtain the mean of the following distribution and also find the mode.

A random survey of the number of children of various age groups playing in a park was found as follows : Draw a histogram to represent the data above.

In this question, the class sizes are different. So, calculate the adjusted frequency for each class by using the following formula : Let us represent the class intervals along X-axis and corresponding adjusted frequencies on Y-axis on a suitable scale. Now, draw rectangles with the class intervals as bases and the corresponding adjusted frequencies as the heights. Therefore, the required histogram is as given below :. In a mathematics test given to 15 students, the following marks out of are recorded : 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, Find the mean, median and mode of this data.

The following two tables gives the distribution of students of two sections according to the marks obtained by them : [CBSE March , ] Represent the marks of the students of both the sections on the same graph by two frequency polygons.

From the two polygons compare the performance of the two sections. The class marks are as under : Let us take class marks on X-axis and frequencies on Y-axis. To plot frequency polygon of Section-A, we plot the points 5, 3 , 15,9 , 25,17 , 35,12 , 45,9 and join these points by line segments.

To plot frequency polygon of Section-B, we plot the points 5,5 , 15,19 , 25,15 , 35,10 , 45,1 on the same scale and join these points by dotted line segments. From the above two polygons, clearly the performance of Section-A is better. The following data given the weight in grams of 30 oranges picked from a basket: 76 95 92 70 88 84 99 90 97 90 75 80 82 Construct a grouped frequency distribution table taking class width equal to 20 in such a way that the mid-value of first class in From the frequency table, find the number of oranges i weighing more than g.

The following table gives the pocket money in Rs given to children per day by their parents : Represent the data in the form of a histogram. The required histogram is as below :. In a school marks obtained by 80 students are given in the table.

Draw a histogram. Also, make frequency polygon. Draw a histogram and frequency polygon for the following distribution : Answer. We represent class limits along x-axis and number of students along y-axis on a suitable Scale. Following is the frequency distribution of total marks obtained by the students of different section of class-IX.

Draw a histogram for the distribution. Since class intervals of the given frequency distribution are not of equal width. We would make modifications in the lengths of the rectangles in the histogram, so that the areas of rectangles are proportional to the frequencies.

Now, we draw rectangles with lengths as given in the last column. The histogram of the data is given below :. Following table gives the distribution of students of sections A and B of a class according to the marks obtained by them. Represent the marks of the students of both the sections on the same graph by two frequency polygons. What do you observe? Value Based Questions 1. The following data on the number of girls to the nearest ten per thousand boys in different sections of the Indian society is given below : i Represent the information above by a bar graph.

Shimpi, a class IX student received cash Byjus Class 10 Maths Real Numbers To award of Rs Ten thousand in the singing competition. Her father advised her to make a budget plan for spending this amount. She made the following plan : Make a bar graph for the above data.

From above answer the following questions : i Which mathematical concepts have been covered in this? In your opinion which head has been given a more than deserved and b less than it deserved? The bar graph of given data is given below : In the graph, head is taken on X-axis and amount is taken on Y-axis. In a year, the number of deaths due to habit of smoking for different age group is given below : i Represent the given information with the help of a histogram.

Find the mean of children per family from the data given below : What values are depicted from this data? The information gathered is listed in the table below.

Suppose a family is chosen. A teacher wanted to analyse the performance of two sections of students in a mathematics test of marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above.

So she decided to group them into intervals of varying sizes as follows 0 � 20, 20 � 30, �, 60 � 70, 70 � To know the opinion of the students about the subject statistics, a survey of students was conducted. The data is recorded in the following table Find the probability that a student chosen at random i likes statistics, ii does not like it. The distance in km of 40 engineers from their residence to their place of work were found as follows What is the empirical probability that an engineer lives i less than 7 km from her place of work?

Activity: Note the frequency of two-wheelers, three-wheelers and four-wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler? Solution: It is an activity. Students can do it themselves. Activity : Ask all the students in your class to write a 3-digit number.

Choose any student from the room at random. Remember that a number is divisible by 3, if the sum of its digit is divisible by 3.

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