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<p>[QUOTE=&quot;wxcoin, post: 2621419, member: 74624&quot;]What I wanted to say is that for 2 graders the chance of BOTH getting the grade wrong is .2x.2=.04 or 4%.&nbsp; The chance for both getting it correct is .8x.8=.64 or 64%.&nbsp; That means at least one got the grade wrong 36% of the time.&nbsp; For three graders the chance that all 3 are wrong is .2x.2x.2=.008 or .8%.&nbsp; In addition, the chance that all three get it correct is .8x.8x.8=.512 or 51.2%.&nbsp; That means that at least one gets it wrong 48.8% of the time.[/QUOTE]</p><p><br /></p>

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