document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199363>Question 1199363</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You really struggle remembering to bring your lunch to work. Each day seems to be independent as to whether you remember to bring your lunch or not. The chance that you forget your lunch each day is 39.9%.\r<BR>\n" );
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document.write( "Consider the next 45 days. Let  X  be the number of days that you forget your lunch out of the 45 days. Calculate the following:\r<BR>\n" );
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document.write( "I managed to find μX but I have no idead on how to find the other answers.\r<BR>\n" );
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document.write( "μX : 17.955\r<BR>\n" );
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document.write( "σX : \r<BR>\n" );
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document.write( "P(X=18) :\r<BR>\n" );
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document.write( "P(X<21) : \r<BR>\n" );
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document.write( "P(X>15) : \r<BR>\n" );
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document.write( "P(15≤X≤20) : <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #833216 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(53751)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=833216\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "This problem is on Binomial distribution.\r<BR>\n" );
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document.write( "If you don't know how to approach this problem with its several questions, it means that<BR>\n" );
document.write( "you are unfamiliar with Binomial distribution.\r<BR>\n" );
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document.write( "At this site, &nbsp;there are several lessons where many similar problems were solved and presented in all details\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Solving-problems-on-Binomial-distribution-manually.lesson>Simple and simplest probability problems on Binomial distribution</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Typical-binomial-distribution-probability-problems.lesson>Typical binomial distribution probability problems</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Solving-problems-on-Binom-distr-with-Technology-%28using-online-solver%29.lesson>Solving problems on Binomial distribution with Technology (using online solver)</A> \r<BR>\n" );
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document.write( "Look into these lessons.\r<BR>\n" );
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document.write( "After reading/learning from these lessons, &nbsp;you will be able to solve such problems on your own, which is your \r<BR>\n" );
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document.write( "PRIMARY &nbsp;MAJOR &nbsp;GOAL &nbsp;visiting this forum &nbsp;(I believe).\r<BR>\n" );
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document.write( "If you will have questions after reading these lessons, do not hesitate to post your questions to the forum.\r<BR>\n" );
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document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "Regarding μX, use the formula  μX = n*p,   \r\n" );
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document.write( "    where n is the number of trials  (45 in your problem), \r\n" );
document.write( "    and p is \"the probability of individual success at each single trial\",\r\n" );
document.write( "    p = 0.399 in your problem.\r\n" );
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document.write( "Regarding  σX,  use the formula  σX = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28n%2Ap%2A%281-p%29%29 ALIGN=MIDDLE  ALT=\"sqrt%28n%2Ap%2A%281-p%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
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document.write( "See the links\r<BR>\n" );
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document.write( "https://stats.libretexts.org/Bookshelves/Introductory_Statistics/Book%3A_Statistics_Using_Technology_(Kozak)/05%3A_Discrete_Probability_Distributions/5.03%3A_Mean_and_Standard_Deviation_of_Binomial_Distribution\r<BR>\n" );
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document.write( "https://study.com/skill/learn/how-to-calculate-the-standard-deviation-of-a-binomial-distribution-explanation.html\r<BR>\n" );
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document.write( "https://study.com/skill/learn/how-to-calculate-the-standard-deviation-of-a-binomial-distribution-explanation.html\r<BR>\n" );
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document.write( "It is written in each and every textbook on Statistics and in thousands Internet web-sites.\r<BR>\n" );
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