hi MathNewbie22

This is an example of the binomial distribution.

Binomial because, for each question, there are two possible outcomes, R-Right and W-Wrong.

P(R) = 0.25

P(W) = 0.75

For 6 right answers it cannot be P(one right) times 6 (= 1.5) because you cannot have a probabliity over 1.

If adding each probability were correct it would get more and more likely to get none wrong, the more questions that were asked. ????

No, what you do is multiply the probabilities like this:

P(RR) = 0.25 x 0.25

P(RRR) = 0.25 x 0.25 x 0.25

and so on.

So for 6 questions all correct

Bob