Question

Offices in Delhi are open for 5 days a week Monday to Friday. Two employees of an office remain absent for one day in the same particular week. Find the probability that they remain absent on the same day. Also, find the probability that it was a Friday.

Accepted Answer

Total outcomes for 2 employees choosing 1 of 5 days = $5 	imes 5 = 25$. (i) Favourable outcomes for same day = 5 (Mon-Mon, Tue-Tue, Wed-Wed, Thu-Thu, Fri-Fri). $	ext{Probability} = \frac{5}{25} = \frac{1}{5}$. (ii) Favourable outcome for both absent on Friday = 1 (Fri-Fri). $	ext{Probability} = \frac{1}{25}$.

Probability of employee absence

Explanation

Practise this under board exam conditions