SOLUTION: in how many ways four books of maths and three books of physics be placed on a shelf so that the books on the same subject are always together?please tell
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Question 842122: in how many ways four books of maths and three books of physics be placed on a shelf so that the books on the same subject are always together?please tell Answer by ewatrrr(24785) (Show Source):
Hi,
in how many ways four books of maths and three books of physics be placed on a
shelf so that the books on the same subject are always together?
The idea is to think of the books on the same subject as 'one' unit: ways
