رد: يلا نزآآآكـــر الإحصآإء سسوآإآإ ..
A multiple choice quiz consists of 5 questions, each with 6 possible answers. If a student guesses the answer
of each question, then
26. the mean number of correct answers is ...
A) 1.20 B) 0.83 C) 0.875 D) 1.14
27. the probability of guessing exactly two correct questions is ...
A) 0.227 B) 0.168 C) 0.161 D) 0.246
28. the probability of at least one correct answer is ...
A) 0.607 B) 0.738 C) 0.598 D) 0.709
احد يجاوبني على ده السؤال ضروووووووووورررريييييييي
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