Find the mean of the marks obtained by 30 students in a school test- marks are nbsp-10- 20- 36- 92- 95- 40- 50- 56- 60- 70- 92- 88- 80- 70- 72- 70- 36- 40- 36- 40- 92- 40- 50- 50- 56- 60- 70- 60- 60 and 88-59-25857-359-3

The correct option is D 59.3We know that, Mean =Sum of marks obtained by students/Number of students Now, mean =10 + 20 + 36 + 92 + 95 + 40 + 50 + 56 + 60 + 7 ...

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Standard IX

Mathematics

Find the mean...

Question

Find the mean of the marks obtained by 30 students in a school test, marks are 10, 20, 36, 92, 95, 40, 50, 56, 60, 70, 92, 88,
80, 70, 72, 70, 36, 40, 36, 40, 92, 40, 50, 50, 56, 60, 70, 60, 60 and 88.

59.2

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57.3

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59.3

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Solution

The correct option is D 59.3
We know that,
Mean = $\frac{S u m o f m a r k s o b t a i n e d b y s t u d e n t s}{N u m b e r o f s t u d e n t s}$

Now, mean
$= \frac{10 + 20 + 36 + 92 + 95 + 40 + 50 + 56 + 60 + 70 + 92 + 88 + 80 + 70 + 72 + 70 + 36 + 40 + 36 + 40 + 92 + 40 + 50 + 5056 + 60 + 70 + 60 + 60 + 88}{30}$
$= \frac{1779}{30}$
$= 59.3$

Thus, the mean of the marks obtained by 30 students in a school test is 59.3.

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Similar questions

Q. Find the mode of the marks obtained by 80 students in a class test in English as given below:

Marks	0-10	10-20	20-3	30-40	40-50	50-60	60-70	70-80
Number of students	3	5	16	12	13	20	6	5

Q. The marks obtained by 40 students of a class are given below: 80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90, 50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60 and 60.
How many students obtained marks below 40

The marks obtained by $40$ students of a class are given below :
$80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70,$
$10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,$ $50, 80,$
$60, 70, 40, 50, 60, 90, 60, 40, 40, 60$ , and $60$

How many numbers are less than

35

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Standard IX Mathematics

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Find the mean of the marks obtained by 30 students in a school test, marks are 10, 20, 36, 92, 95, 40, 50, 56, 60, 70, 92, 88, 80, 70, 72, 70, 36, 40, 36, 40, 92, 40, 50, 50, 56, 60, 70, 60, 60 and 88.

The correct option is D 59.3We know that, Mean =Sum of marks obtained by studentsNumber of students Now, mean =10+20+36+92+95+40+50+56+60+70+92+88+80+70+72+70+36+40+36+40+92+40+50+5056+60+70+60+60+8830 =177930 =59.3 Thus, the mean of the marks obtained by 30 students in a school test is 59.3.

Find the mean of the marks obtained by 30 students in a school test, marks are 10, 20, 36, 92, 95, 40, 50, 56, 60, 70, 92, 88,
80, 70, 72, 70, 36, 40, 36, 40, 92, 40, 50, 50, 56, 60, 70, 60, 60 and 88.