15 ms·
There are two choices. If everyone guessed, the expected value is 50% correct and 50% incorrect. This is why it's 25/75 for the question with four choices.
by chrisoverzero 13y ago
There are two choices. If everyone guessed, the expected value is 50% correct and 50% incorrect. This is why it's 25/75 for the question with four choices.