Nina has observed that her coach does not coordinate the color of his socks to anything else that he wears. Guessing that the color is a random selection, she records these data during three weeks of observation: black, white, black, white, black, white, black, red, white, red, white, white, white, black, black
a. What is the probability that he will wear black socks the next day?
b. What is the probability that he will wear white socks the next day?
c. What is the probability that he will wear red socks the next day?