A store runs a promotion in which each customer is given a token that is redeemable for cash, credit, or merchandise during each visit to the store. One hundred out of the 10,000 tokens are redeemable for a $100 store credit. Assuming that the probability of getting a winning token remains constant and that each visit to the store is independent of other visits, find the approximate probability that a person will receive his first $100 store credit token on either his 6th or 7th visit to the store.