Question 1191179
5. How many numbers may be formed by using 4 out of the 5 digits 1,2,3,4,5.
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Each choice is 1 of 5 ---> 5*5*5*5 = 625
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(c) begin with 2
The following 3 are 1 of 5 --->  5*5*5 = 125
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(d) end with 25?
The first 2 are 1 of 5 ---> 5*5 = 25