A drawer contains 3 black socks, 3 white socks, 2 red socks, and 1 purple sock. A red sock is pulled at random from the drawer, but returned because it had a hole. What is the probability that a black sock will be next sock pulled at random

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges