Statistics please assist

One hundred players have entered a tennis tournament. They are classified by age and gender as follows. Female Male Junior 25 15 Senior 20 40 The probability that a randomly selected player is a senior or a female is Select one: O 20 60 O 20 45 O 20 100 O 85 100The time it takes to assemble an electronic component is normally distributed with a mean of 17 minutes and a standard deviation of 3 minutes. The probability is 0975 that it will take at least how long to assemble a component? Select one: 15.04 minutes 22.88 minutes 14.075 minutes 11.12 minutes A business consultant wishes to estimate the mean investment for 500 depositors using a 95% confidence interval. A random sample of 64 depositors had a mean of 125 thousand dollars and a standard deviation of 18 thousand dollars. For the 500 depositors, the 95% confidence interval for the mean investment, in thousands of dollars, is given by: Select one: 18 500-64 125+1.96- V64 500-1 O 0.25 + 1.96 (0.25) (0.75) 64 O 125+1.96- 18 V64 O 18 125-64 500+1.96- V64 125-1The level of significance a is Select one: O the probability of rejecting Ho when Ho is true O the probability of conducting a two-tailed test O the probability of committing a type ll error O the probability of accepting Ho when Ho is falseThe following is the probability distribution of a discrete random variable X. The value of a is Select one: 0.1 10 1 0.01