1. How many 12-digit phone numbers can be created with the
following restrictions:
a) no restrictions
b) first...
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Basic Math
1. How many 12-digit phone numbers can be created with thefollowing restrictions:
a) no restrictions
b) first number cannot be zero or one.
c) no repeated numbers
2. Find the number of distinguishable permutations of theletters in the following words.
a) CALCULUS
b) PEPPER
c) MISSISSIPPI
Answer & Explanation
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1 a The number of 12digit phone numbers can be createdwithout any restrictions Sinceeach digit can be any one of the 10 digits so total possibilitiesare 10 10 12 times
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