There are 16 squares and I have to place 4 balls in 4 different squares. I can't place 2 balls in the same square. How many comb
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To find the cross product, you can set this up as a proportion. Please see the attached paper for one of the proportions you could use.
You would then multiply the numbers that are diagonal from each other.
You would have 21(8) = 12x or
168=12x.
You would then multiply the numbers that are diagonal from each other.
You would have 21(8) = 12x or
168=12x.