the bag contains 2 yellow marbles 3 pink marbles, and 5 blue marbles, what is the probability of drawing 2 blue marbles if the first marble is placed in the bag after the first draw

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?