Aspire Faculty ID #13978 · Topic: JAMIA MILLIA ISLAMIA MCA 2020 · Just now
JAMIA MILLIA ISLAMIA MCA 2020

How many five-digit numbers can be made from the digits 1 to 7 if repetition is allowed?

Solution

Since repetition is allowed and digits are 1–7, for each of 5 positions there are 7 choices. Total numbers $= 7^5 = 16807.$

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