Students 2 10 15 20 25
Marks 100 90 75 80 85
Find the mean for the following data

15.010

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14.520

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13.837

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16.127

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Solution

The correct option is C $13.837$
Students
$x i$ $\sum M a r k s$
$f i$ $\sum f i x i$
2 100 200
10 90 900
15 75 1125
20 80 1600
25 85 2125
$\sum f i = 430$ $\sum f i x i = 5950$
Arithmetic mean using direct method $¯ x = \frac{\sum f_{i} x_{i}}{\sum f_{i}}$
Mean, $¯ x = \frac{5, 950}{430}$
$¯ x = 13.837$ .

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Students $x i$	$\sum M a r k s$ $f i$	$\sum f i x i$
2	100	200
10	90	900
15	75	1125
20	80	1600
25	85	2125
	$\sum f i = 430$	$\sum f i x i = 5950$

Students 2 10 15 20 25 Marks 100 90 75 80 85Find the mean for the following data

The correct option is C 13.837 Students xi∑Marks fi ∑fixi 2100 200 10 90 900 15 75 1125 20 80 1600 25 85 2125 ∑fi=430 ∑fixi=5950Arithmetic mean using direct method ¯x=∑fixi∑fiMean, ¯x=5,950430¯x=13.837.

Students 2 10 15 20 25
Marks 100 90 75 80 85
Find the mean for the following data