Question 1194017
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A very poorly presented problem; more information is needed:<br>
Are the 20 questions true/false? or multiple choice with 4 answer choices? or 5 answer choices?<br>
Also, the wording of the problem uses bad English.  The "probability that they both have 5 correct answers" could mean the EACH of them has 5 correct answers, or it could mean that the two of them TOGETHER have a total of 5 correct answers.<br>