There are 35 identically sized balls in a box, where 5
of each of the colors are present: red, orange, yellow, green,
blue, indigo, and violet. Justify your answer for
each.
a. Suppose you draw a sample of seven balls without
replacement from the box. What is the probability that the sample
contains balls of exactly two colors? (for example, the event for
which you have 4 red and 3 blue would satisfy)
b. Suppose you draw a sample of...