Question: There are five blue marbles, two yellow marbles, four red marbles and three
green marbles in a bag. How man marbles would you have to withdraw to
guarantee that you have at least two marbles of the same color?
Thanks in advance.
  Edit

Answer: 5 blue marbles, 2 yellow marbles, 4 red marbles, and 3 green marbles.
Total no of marbles=5+4+2+3=14
You need to withdraw 2+3+4+2=11 marbles to
guarantee that you have at least two marbles of the same color.  Edit