Katy chose a card at random from a deck of 52 cards. katy replaced the first card and then chose a second card. what is the probability that katy chose a diamond both times?

a). 1/16
b). 1/52
c). 1/169
d). 1/208

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

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 is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?