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if there are 4 geometry books, 2 trigonometry books, and 1 statistics book, how many ways can he arrange the top layer of the shelf?​


Sagot :

Answer: 105

Explanation:

Given: Statement

To find: Total ways of arranging.

Solution: Total ways of arranging books on a shelf.

= 7! / 4! 2!

= 7x6x5x4!/2x1x4!

= 105

Note: Do not include this to your assignment- (/ is represented as a fraction)

ex: 1/5