Andy has 4 red socks and 8 black socks in his drawer. He takes 2 socks at random from his drawer. The random variable X is the number of red socks taken. Write a probability distribution table for X.​

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?