A telephone call center where people place marketing calls to customers has a probability of success of 006 . Find the number of calls needed to ensure that there is a probability of at least 0.76 of obtaining eight or more successful calls (Hint Start by checking the probability of eight or more successful calls in 145 calls ) The number of calls needed to ensure that there is a probability of at least 0.76 of obtaining eight or more successful calls is (Type a whole number)