You have four colors to choose from, with black and green being the highest. So I added those two and subtract from the total amount of marbles. If you was to pick one of each color, you still have one pick left, guaranteeing two of the same color. Right? Maybe someone else will answer this question!
x + 16 = 21
x = 21 - 16
x = 5
5 marbles
A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second box to be certain that two of the marbles in the second box are the same color?
Please explain??????
1 answer
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