Based upon statistical studies it has been found that 3.32% of all births in the United States will result in twins being born. If 17,300 births are selected at random what is the probability that:
a) at most 600 of them will result in twins being born?
b) between 525 and 550 of them (inclusive) will result in twins being born?
The solution provides step by step method for the calculation of probability using the Z score. Formula for the calculation and Interpretations of the results are also included.