SOLUTION: How do you know whether a word problem is a combination or permutation?

Question 35021: How do you know whether a word problem is a combination or permutation?
Answer by Prithwis(166) (Show Source): You can put this solution on YOUR website!
When the order of an arrangement does not matter, it would be a combination Permutation is applicable for ordered arrangements.
An example of a combination is to find out the number of ways to get two heads when five coins are tossed; it does not matter in which coin-toss the head appears as long as there are two heads in five tosses;
Number of ways in which a two-digit number can be formed using 1 and 2 is an example of Permutation; 12 and 21 are different because of the position of 1 and 2 in the two digit number.
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