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nika2105 [10]
3 years ago
5

How many different ways can 4 paintings be arranged in a row?

Mathematics
1 answer:
slavikrds [6]3 years ago
8 0
For this question, the order of the paintings matter, so we can use generic permutation formula.

P = n!/(n-r)!

where:
n= number of paintings
r = number of paintings we are picking (in this case, we are selecting all paintings, as we are rearranging the paintings)

P = 4!/(4-4)!
P = 24/0! = 24 ways

4 paintings can be arranged in 24 different ways.
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Solutions 

⇒ Given 

Salary - $ 20 

Spends - $ 14 

The first step is to subtract 14 from 20. When we do this, we will know how much he saves.

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