A box contains 4 red and 6 black balls. Two balls are selected
one after the other,
a) What is the probability that the first ball selected is black
and the second ball selected is also black, if the selection is
done without replacement.
b) What is the probability that the first ball selected is black
and the second ball selected is red, if the selection is done
without replacement.
c) What is the probability that the first ball selected is red
and the second ball selected is black, if the selection is done
with replacement.