Data Handling| Worksheet Solutions| Class 7

Worksheet solutions for chapter: Data Handling for class 7 are provided below.

 

(1) The ages of the players of a team are given below in years.

34,24,38,30,31,26,27,28,32,25

(i)What is the age of the oldest player and that of youngest player?

(ii) What is the range of the ages of the players?

(iii)What is the mean age of these players?

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(2) The scores of the 11 students are given below:

50,45,34,33,46,35,42,40,38,36,35

(i) Find mode of the data.

(ii) Find median of the data.

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(3)Tell whether the statements true or false:

(i) The mode is always one of the numbers in a data.

(ii) The mean is one of the numbers in a data.

(iii)The median is always one of the numbers in a data.

(iv)The data 6,4,3,8,9,12,13,9 has mean 9.

Ans-

Data Handling, Practice Sheet Q4 , NCERT.jpg

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(i)The required bar graph is shown below:

(ii) Chota Bhim is the most popular character.

(iii) Scooby is the least popular.

 

(5) Tell whether the following is certain to happen, impossible, can happen but not certain.

(i)The Sun rises in the East.

(ii) It will rain today.

(iii)The stars can be seen in day.

Ans-

(i)The Sun will rise in the East tomorrow.  Certain to happen

(ii) It will rain today.  Can happen but not certain

(iii) The stars can be seen in the day. Impossible

 

 

(6) There are one orange and one apple in a bag. What is probability to get orange?

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Data Handling, Practice Sheet Q7 , NCERT.jpg

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(8) Fill in the blanks:

(i) Mean is the ___ of the data.

(ii)The middle value is called————-of the data.

(iii) The difference of highest and lowest data is called ———–.

Ans-

(i) Mean is the average of the data.

(ii)The middle value is called median of the data.

(iii) The difference of highest and lowest data is called range.

 

(9) Sale of English and Hindi books in the years 1995,1996,1997,1998 are given below:

Years 1995 1996 1997 1998
English 350 400 450 620
Hindi 500 525 600 650

Draw a double bar graph and answer the following questions:

(i) In which year was the difference in the sale of the two language books least?

(ii) Is demand for English book rose faster?

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Required double bar graph is shown below:-

(i)In 1998 the difference in the sale of the two language books was least.

(ii)Yes, the demand for English book rose faster.

 

(10) A cricketer scores the following runs in eight innings:

58, 66,70,80,99,76,78,88

Find the mean score.

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Helping Topics

Data Handling

NCERT Solutions Class 7