In a school there 6 periods a day and 5 subjects, arrange this such that at least one period is repeated every day

Question

Question belongs to the topic PROBABILITY

Answer 1

In a 5-day week there are 30 periods (6*5). There are 5 subjects so we can them A, B, C, D, E.

Mon: ABCDEA

Tue: BCDEAB

Wed: CDEABC

Thu: DEABCD

Fri: EABCDE

The first and last periods of each day are for the same subject, so that in a week each of the 5 subjects is repeated so that there are 6 periods for each subject in a week.