Suppose you have a heads/tails coin.
suppose you toss it with a 50: 50 chance for each side.
now, if you toss it what are the chances you're getting tails at least once?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?