ATV remote control has keys for channels 0 through 9.
​a) If a key is selected at​ random, what is the probability that the key for channel 7 is​ pressed?
​b) If a key is selected at​ random, what is the probability that the key for an even number is​ pressed?
​c) If a key is selected at​ random, what is the probability that the key for a number less than 1 is​ pressed?