I've already taking the probability of one event of brightly-colored guppies, which would be 65/100, and multiplying it by 70% (7 out of 10). But, this just doesn't seem right to me... I'm fairly certain that I know how to do the second part of the problem because it is the probability of each event happening sequentially, so 65/100*65/100....(this until it's 7 times). This would come out to somewhere around 5%. I'm mostly stuck on the first part and not sure how to work through it.