1.

A three-digit number is to be made using the digits 1, 3, 5, and 8.How many numbers can be made if repeated digits are allowed?

Answer»

\huge\sf\underline{\red{Answer}}

A THREE digit number is to be FORMED from given 5 digits 1,2,3,4,5.

□□□

HTO

Now, there are 5 ways to fill ONES place.

Since, repetition is not allowed , so tens place can be FILLED by REMAINING 4 digits.

So, tens place can be filled in 4 ways.

Similarly, to fill hundreds place, we have 3 digits remaining.

So,hundreds can be filled by 3 ways.

So, required number of ways in which three digit numbers can be formed from the given digits is 5×4×3=60

\huge\sf\underline{\pink{Thanks}}



Discussion

No Comment Found

Related InterviewSolutions