According to a poll about 19% of adults in a country bet in professional sports. data indicates that 47.9% of the adult population in this country is male
(a) assuming that betting is independent of gender compute the probability that an adult from this country selected at random is a male and bets in professional sports
(b) using the result in part (a) compute the probability that an adult from this country selected at random is male or bets if professional sports

This is so hard and it’s for a test

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?