Try another version of this question Get help: Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
You pick 7 digits (0-9) at random without replacement, and write them in the order picked.
What is the probability that you have written the first 7 digits of your phone number? Assume there are no repeats of digits in your phone number.
Give your answer as a fraction.
Enter DNE for Does Not Exist, oo for Infinity 1/604800