Question

The marks (out of 100) obtained by a group of students in a science test are 85, 76, 90, 85, 39,

48, 56, 95, 81 and 75. Find the Mean marks obtained by the group.​

Answer 1

Answer:

Marks obtained by a group of students in a science test can be arranged in ascending order as follows-

39, 48, 56, 75, 76, 81, 85, 90, 95

i) Highest marks = 95

Lowest marks = 39

ii) Range = 95-39 = 56

iii) Mean marks = 85 + 76 + 90 + 85 + 39 + 48 + 56 + 95 + 81 + 75 / 10 =

730 / 10 = 73

Answer 2

1)

$\frac{sum \: of \: no}{total \: no \: }$

$\frac{85 + 76 + 90 + 85 + 39 }{5}$

$\frac{375}{5}$

$75$

answer of 1 part

2)

$\frac{sum \: of \: all \: no \: }{tota l \: no}$

$\frac{48 + 56 + 95 + 81 + 7}{5}$

$\frac{287}{5}$

$57.4$

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