SOLUTION: A multiple choice test has five choices for every question. What is the probability that you get 3 out of the first 10 questions right? I thought the answer would be .8 to the

Question 442975: A multiple choice test has five choices for every question. What is the probability that you get 3 out of the first 10 questions right?
I thought the answer would be .8 to the power of 7 times .2 to the power of 3, but that is not correct per the answer guide.
Please help.
Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
You have a (1/5) chance that you will get a 100% on this test. If you just want to get a 30% on the test, you would have a (1/5)*(100/30) chance of getting a 30% or... (100/150) = (2/3)
You have a 2/3 chance of getting a 30%.
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