Question

3 The mean width of 12 iPads is 5.1 inches.
The mean width of 8 Kindles is 4.8 inches. What is the mean width of the 12 iPads and 8 Kindles?

Answer 1

$We \:know \:that \\\boxed {\pink {Mean = \frac{Sum \:of \:the \: observations }{ Number \:of \: observations }}}$

$Given ,\: The \:mean \: width \: of \:12 \:iPads \\is \: 5.1 \: inches$

$Sum \:of \: widths \:of \: 12 \:iPads \\= 12 \times 5.1\: inches \\= 61.2 \:inches \: --(1)$

$and ,\:The \:mean \: width \: of \:8 \: Kindles \\is \: 4.8\: inches$

$Sum \:of \: widths \:of \: 8 \:Kindles \\= 8 \times 4.8\: inches \\= 38.5\:inches \: --(2)$

$Now. Total \: objects = 12 \:iPads + 8 \:Kindles \\= 20 \: objects$

$Now, Mean \: width \:of \: the \:12 \: iPads \\and \: 8 \: Kindles = \frac{(1)+(2)}{Total \: objects } \\= \frac{ 61.8+38.4}{20}\\= \frac{99.6}{20}\\= 4.98 \: inches$

Therefore.,

$\red {Mean \: width \:of \: the \:12 \: iPads}\\\red{and \: 8 \: Kindles}\green {= 4.98 \: inches }$

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Answer 2

Answer:

Step-by-step explanation: