Martin has a science book, an English book, a geography book, and a history book for school. How many different ways can Martin arrange these books on a book shelf?
A. 24 ways
B. 4 ways
C. 32 ways
D. 12 ways
A. 24 ways
B. 4 ways
C. 32 ways
D. 12 ways
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4*6 = 24
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You have 4 books so 4 possible spots: __ x __ x __ x __
In the first spot you can put any of the 4 books, In the second spot you now only have 3 options because you already put a book in the first spot, then 2 options, then 1.
So you are solving: 4 x 3 x 2 x 1 = 24
In the first spot you can put any of the 4 books, In the second spot you now only have 3 options because you already put a book in the first spot, then 2 options, then 1.
So you are solving: 4 x 3 x 2 x 1 = 24
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The answer is 4!, that is: 4*3*2*1 which would equal 24. So, the answer is A
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