A shop has in its stock 80 rectangular celebrity posters. All of these posters have a width
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A shop has in its stock 80 rectangular celebrity posters. All of these posters have a width to height ratio of 1: √2, and their mean perimeter is 231.8cm.
Given that the sum of the squares of the widths is 200120cm2, find the standard deviation of the widths of the posters.
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Related Book For
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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