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Date: 4-5-2021
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Date: 14-2-2021
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Date: 1-5-2021
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If proofreader finds
mistakes and proofreader
finds
mistakes,
of which were also found by
, how many mistakes were missed by both
and
? Assume there are a total of
mistakes, so proofreader
finds a fraction
of all mistakes, and also a fraction
of the mistakes found by
. Assuming these fractions are the same, then solving for
gives
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The number of mistakes missed by both is therefore approximately
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REFERENCES:
Pólya, G. "Probabilities in Proofreading." Amer. Math. Monthly, 83, 42, 1976.
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دخلت غرفة فنسيت ماذا تريد من داخلها.. خبير يفسر الحالة
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ثورة طبية.. ابتكار أصغر جهاز لتنظيم ضربات القلب في العالم
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سماحة السيد الصافي يؤكد ضرورة تعريف المجتمعات بأهمية مبادئ أهل البيت (عليهم السلام) في إيجاد حلول للمشاكل الاجتماعية
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