Mathematics

Mathematics, 03.02.2021 04:40, Ellafrederick

A multiple choice test is given with 5 choices for each of 25 questions. suppose the test is answered by guessing. A) what is the random variable x defined to be?
B) what is the probability of gifted at least 10 questions correct?
C) what is the expected number of questions answered correctly by guessing
D) what is the standard deviation of this distribution?

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