Abowl contains 4 red marbles and 3 yellow marbles. tim randomly draws 3 red marbles from the bowl. he replaces each marble after it is drawn. what is the probability that he draws 2 yellow and 1 red?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.