What is the probability of three heads if you throw three coins at the same time?

•What is the probability of three heads if you throw three coins at the same time?

•Assume that you work for New York Yankees and they wanted to get Jose Ramirez whose batting average is 0.28. You calculate the variance of his hits as 0.15. Then, what is the probability that he will have an average of 0.30 or over next season?