Sex ratio of newborn human infants
The sex ratio of newborn human infants is regarding 105 males : 100 females. If four infants are selected at random, determine the probability that (a) two are male and two are female? (b) all four are male? (c) all four are the same sex?
Expected delivery within 24 Hours
Suppose that Z has a standard normal distribution. Employ Appendix A Table I to find out the value for z that solves each of the following.
When lucy swims with current, she swims 18km in 2 hours. against current she can swim only 14km in same time. How fast can lucy swim in still water? Determine rate of current?
Determine the probability that a randomly selected adult drinks only soda? Determine the probability that a randomly selected adult drinks none of these three beverages?
If speed of plane had been one-half actual speed and speed of ship had been 0ne-fourth greater, person would have traveled only 1315 miles in same length of time. Determine speeds of plane and ship.
When she returns home, weather is bad and she drives ten miles per hour slower and it takes her two hours longer. Determine Jennifers speed on every part of trip.
The patrol plane flies 220 miles per hour in still air. It has fuel for four hours of safe flying. If it takes off on patrol against the wind of 20 miles per hour, how far it can fly and return safely?
Suppose that 1000 women take early pregnancy tests and that 150 of them really are pregnant. Determine the probability that a randomly selected woman from this group will test negative?
Connection point at house has coordinates(1,4), where units represent metres. What length of plastic pipe is required to connect to water main at closest point?
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