If the probability of getting a particular result in an experiment is 75.3%, what is the probability of not getting that result?

a) 75.3%+100% b) 75.3%-100% c) 100%-75.3% d) 1/75.3%

Well the probabilities of one or more different outcomes have to add up to 100%. You can't have one outcome be 90% and another be 20% because it does not equal 100%.

So if you know the percentage of one outcome you have to subtract that from 100%

That means C is your answer.