Question

The heights (in cm) of 12 boys are as follows:
141, 136, 128, 135, 142, 133, 139, 147, 151, 145, 138, 145
(1) What is the height of the shortest boy?
(ii) What is the height of the tallest boy?
(it) What is the range of their heights?
(iv) Find the mean height of the boys?
(0) How many boys have heights more than the mean height?
zation 32 was mis​

Answer 1

$The \:heights \: of \:12 \:boys \:are:$

$141,136,128,135,142,133,\\139,147,151,145,138,145$

/* Arranging the heights in ascending order */

$128,133,135,136,138,139,\\141,142,145,145,147\:and \:151$

$(1) What\: is\: the\: height \:of\: the \:shortest \:boy?$

$Height \:of\: the \:shortest \:boy = 128 \:cm$

$(2) What\: is\: the\: height \:of\: the \: tallest \:boy?$

$Height \:of\: the \:tallest\:boy = 151 \:cm$

$(3)What\: is\: the\: range \:of\: their \:heights?$

$Range = Tallest \: height - Shortest \:height \\= 151 \:cm - 128 \: cm \\= 23 \:cm$

$(4) Find\: the\: mean\: height \:of \:the\: boys?$

$Mean = \frac{ Sum \:of \:the\:heights }{Number \:of \: students } \\= \frac{1680}{12} \\=140$

$5) How\: many\: boys\: have\: heights \:more\\ than\: the \:mean\: height?$

$6 \: Boys$

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Answer 2

Answer:

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