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a student takes a 6 question multiple choice quiz with 4 choices for each question. if the student guesses at random on each question , what is the probability that the student gets exactly 3 question correct

الجواب 0.132


if 4 different sized washers are arranged in a row,then the probabiltiy that they will be arranged in order of size is ?

الجواب
12 \1
بليز احد يشرح لي كيف انحلت s: ؟؟؟


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