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1)How many different 3 digit numbers can be made using the digits 1, 2 and 3 if each digit is used once?
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2) How many different 3 digit numbers can be made using the digit 1,2 and 3 if each digit can be used more than once?
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3) How many different 4 digit numbers can be made using the digits 0, 1, 2 and 3,if each digit can be used once?
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4) How many different 4 digit numbers can be made using the digits 1,2,3 and 4 if each digit can be used once?
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5) A fair coin is tossed twice, how many possible outcomes?.
6) In a class of 255 students 80 offer chemistry only and 125 offer physics only. Each student studies at least one of the two subjects. How many students study physics?
= physics students
7) Five students are entered in a race. How many different arrangements of 1^{st} 2^{nd} and 3^{rd} are possible?
= arrangements
8) In a class of 40 students 25 of them study English and 15 study Art. If 5 students study neither English nor Art, how many students study both English and Art.
= students
9) Cans in a supermarket display are stack as shown. How many cans are in the stack with 20 in the bottom row?
= cans
10) A tree surgeon charges $15.50 to cut a log into 4 pieces. If the same rate applies, how much will it cost to cut another log into 7 pieces?
=$ .