2.1 times 10 to the tenth power equals 21,000,000,000. 7 times 10 to the seventeenth power equals 700,000,000,000,000,000. 700,000,000,000,000,000 divided by 21,000,000,000 equals 333,333,33.3 continusly.
The number of ways that 7 basketball players can be arranged is 7! = 5040. Only one of these arrangements is alphabetical. So the probability is 1/5040.
