A professor flips two balanced coins. Both fall to the floor and roll under his desk. A student informs the professor that he can see only one coin and it shows tails. What is the probability that the other coin is also tails?
Is it 1/2? I said it was 1/2 because they are independent events? If the question asked what is the probability of getting a combination of T-T , it would be 1/4.
is this right?