Mathematics: A certain drug is used to treat asthma. In a clinical trial of the drug, 17 of 280 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 10% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below.

Step-by-step explanation:Given : An automobile manufacturing plant produced 30 vehicles today: 10 were sedans, 9 were vans, and 11 were trucks.Number of combinations of n things taking r at a time : Number of ways to choose two vehicles out of 30 vehicles :-Number of ways to choose two trucks out of 11 vehicles :-Now, the the probability that two trucks will be selected will be :-...