Four stacks containing an equal number of chips are to be made from 11 orange, 9 white, 13 black and 7 yellow chips. If all of these chips are used and each stack contains at least one chip of each colour, what is the maximum number of white chips in any one stack?
Total number of chips = 11+9+13+7=40
Total number of chips in each stack = 40/4 = 10
Total number of white chips = 9,
The maximum number of white chips in a stack will be obtained when 1 white chip given to each of 3 stacks and 6 white chips to 1 stack.
Hence, 6 is the answer.
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