I suspect problem needs more clarity - is length and width measured parallel to the paper or indicated by the longest and narrowest diameters of each spot? What rule determines membership of each group? And anyway, what does size mean - shoe size? length? area? volume (if the spots are thick)? And I wonder whose fault is it that the problem is so vaguely expressed. If it's yours, get the proper version, otherwise get a proper teacher.

Update: When changing a post, please use "strike" tags rather than actually deleting and replacing, or just add update like this, otherwise you undermine people's replies.

We still need to know what "group" means in this context. It could be integral square millimetres, quarter inches squared, or in fact anything you like of that sort.

One world, one people

In reply to Re: Image Operation by anonymized user 468275
in thread Image Operation by solo7773

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.