A combination lock has numbers 0-39 inclusive. The lock works by rotating to the right and selecting a number from 0-39, then rotating to the left and selecting a number from 0-39,inclusive, (with one full rotation at most) and then rotating to the right and selecting a number from 0-39 inclusive , with one full rotation at hthe most. Henry randomly tries 10 different combinations to try and get the lock open. What is the probability he will succeed