On a multiple choice test with 17 questions, each question has four possible answers, one of
which is correct. Find the probability that a student guesses at least 2 answers
correctly.
Give the formula or calculator function used. Show work of how you got your
answer.

Using the binomial distribution, it is found that there is a 0.9499 = 94.99% probability that a student guesses at least 2 answers  correctly.

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For each question, there are only two possible outcomes, either the student guesses the correct answer or not. The probability of guessing the correct answer on a question is independent of any other question, which means that the binomial distribution is used to solve this question.

Binomial probability distribution  

In which

Then

0.9499 = 94.99% probability that a student guesses at least 2 answers  correctly.

A similar problem is given at

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.