. The internal telephone numbers in the phone system on a campus consist of five digits, with the first digit not equal to zero.
1 answer:
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Answer:
220
Step-by-step explanation:
Given that the freshman class has 160 students.
Each freshman must write three reports from a list of 12 novels that the teacher has assigned them to read
Here order does not matter. Hence combinations can be used.
No of available options = 12
No to be selected =3
Possible number of ways = ways of selecting 3 from 12 where order does not matter
=
Option B is right answer.