Question

Marks obtained by 15 students of class 7 in half yearly examination of Mathematics are:

45,40,50,45,42,30,25,35,40,42,50,35,40,48,40

Calculate the range, mean, mode and median of the data.

Answer 1

Answer:

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Chapters in NCERT Solutions - Mathematics, Class 7

Exercises in Data Handling

Question 4

Q3 The weights (in kg.) of 15 students of a class are:

38, 42, 35, 37, 45, 50, 32, 43, 43, 40, 36, 38, 43, 38, 47

(i) Find the mode and median of this data.

(ii) Is there more than one mode?

Solution

Transcript

Solution:

Let us arrange the data in ascending order

32,35,36,37,38,38,38,40,42,43,43,43,45,47,50.

i) Mode = 38 and 43 as they occured the maximum number of times

Median = \left(\frac{n+1}{2}\right)^{th}\

n = 15

\frac{15\ +\ 1}{2}

= \frac{16}{2\ }\ =\ 8th\ term

8th term = 40

Thus, mode of the data is 38 and 43

Median = 40

ii) Yes, the given data has two modes.

here you can change numbers