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Arithmetic Mean and Range

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Question

Question 1
Answer
Find the range of heights of any ten students of your class.

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Solution

$\begin{matrix} S . N o . & N a m e s o f s t u d e n t s & H e i g h t (i n f e e t) 1. & G u n j a n & 4.2 2. & A d i t i & 4.5 3. & N i k h i l & 5 4. & A k h i l & 5.1 5. & R i y a & 5.2 6. & A k s h a t & 5.3 7. & A b h i s h e k & 5.1 8. & M a y a n k & 4.7 9. & R a h u l & 4.9 10. & A y u s h & 4.5 \end{matrix}$
Range = Highest height – Lowest height
= 5.3 – 4.2
= 1.1 feet.

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Similar questions

Find the range of heights of any ten students of your class.

Following histogram represents the height of the students in a class.:

(i) Find the number of students whose height falls in the range 145 - 160

(ii) Find the height range with the highest frequency.

Q. Prepare a record of heights of the students in your class. Find the modal height.

Q. The following bar graph (Fig. 23.14) represents the heights (in cm) of 50 students of Class XI of a particular school. Study the graph and answer the following questions:

(i) What percentage of the total number of students have their heights more than 149 cm?

(ii) How many students in the class are in the range of maximum height of the class?

(iii) The school wants to provide a particular type of tonic to each student below the height of 150 cm to improve his height. If the cost of the tonic for each student comes out to be Rs. 55, How much amount of money is required?

(iv) How many students are in the range of shortest height of the class?

(v) State whether true or false:
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(b) Maximum height (in cm) of a student in the class is 17.
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(d) Minimum height (in cm) of a student is the class is in the range of 140-144 cms.
(e) The number of students in the class having their heights less than 150 cm is 12.
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Arithmetic Mean and Range

Standard VII Mathematics

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