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{
"url": "https://numbas.mathcentre.ac.uk/api/questions/12161/?format=api",
"name": "Probability - draw without replacement",
"published": true,
"project": "https://numbas.mathcentre.ac.uk/api/projects/601/?format=api",
"author": {
"url": "https://numbas.mathcentre.ac.uk/api/users/697/?format=api",
"profile": "https://numbas.mathcentre.ac.uk/accounts/profile/697/?format=api",
"full_name": "Newcastle University Mathematics and Statistics",
"pk": 697,
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"edit": "https://numbas.mathcentre.ac.uk/question/12161/probability-draw-without-replacement/?format=api",
"preview": "https://numbas.mathcentre.ac.uk/question/12161/probability-draw-without-replacement/preview/?format=api",
"download": "https://numbas.mathcentre.ac.uk/question/12161/probability-draw-without-replacement.zip?format=api",
"source": "https://numbas.mathcentre.ac.uk/question/12161/probability-draw-without-replacement.exam?format=api",
"metadata": {
"notes": "<p><strong>7/07/2012:</strong></p>\n <p>Added tags.</p>\n <p>Included more detail in Advice by showing number of combinations explicitly.</p>\n <p>Answer tolerance set as new variable tol=0.0001. Perhaps 3 dps and tol=0?</p>\n <p>Checked calculation. OK.</p>\n <p><strong>22/07/2012:</strong></p>\n <p>Added description.</p>\n <p>Checked stats extension box.</p>\n <p><strong>31/07/2012:</strong></p>\n <p>Question appears to be working correctly.</p>\n <p><strong>20/12/2012:</strong></p>\n <p>Checked calculation again, OK. Added tested1 tag.</p>\n <p>Note that there is scope for setting questions with different wording to that of urn models.</p>\n <p><strong>21/12/2012:</strong></p>\n <p>Checked rounding, OK. Added tag cr1.</p>",
"licence": "Creative Commons Attribution 4.0 International",
"description": "\n \t\t<p style=\"color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: medium; line-height: normal;\">A box contains $n$ balls, $m$ of these are red the rest white.</p>\n \t\t<p style=\"color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: medium; line-height: normal;\">$r$ are drawn without replacement.</p>\n \t\t<p style=\"color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: medium; line-height: normal;\">What is the probability that at least one of the $r$ is red?</p>\n \t\t"
},
"status": "broken",
"resources": []
}
