For a certain horse race comma the odds in favor of a certain horse finishing in second placehorse race, the odds in favor of a certain horse finishing in second place are given as 3131 to 6969. Express the indicated degree of likelihood as a probability value between 0 and 1 inclusive.

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?