Find the mean height of $30$ players using direct method:

151 c m

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149 c m

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148 c m

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150 c m

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Solution

The correct option is A $151 c m$
Answer:- Using direct method

Height (in cm)
$x_{i}$ No. of Players
$f_{i}$ $f_{i} x_{i}$
100 3 300
120 6 720
150 2 300
160 5 800
170 10 1700
180 4 720
$Σ f_{i} = 30$ $Σ f_{i} x_{i} = 4540$
Mean = $\frac{Σ f_{i} x_{i}}{Σ f_{i}} = \frac{4540}{30} = 151.33 ≃ 151$
Average height is 151 cm.
A)151

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Height (in cm) $x_{i}$	No. of Players $f_{i}$	$f_{i} x_{i}$
100	3	300
120	6	720
150	2	300
160	5	800
170	10	1700
180	4	720
	$Σ f_{i} = 30$	$Σ f_{i} x_{i} = 4540$

Find the mean height of 30 players using direct method:

The correct option is A 151cmAnswer:- Using direct methodHeight (in cm) xiNo. of Playersfi fixi 10033001206 7201502300160 5 800170 101700180 4720 Σfi=30Σfixi=4540 Mean = ΣfixiΣfi=454030=151.33≃151Average height is 151 cm.A)151

Find the mean height of $30$ players using direct method: