Two customers Shyam and Ekta are visiting a particular shop in the same week (Tuesday to Saturday).

There are a total of 5 days. Shyam can go to the shop in 5 ways and Ekta can go to the shop in 5 ways.

Therefore, total number of outcomes = 5 × 5 = 25

(i) They can reach on the same day in 5 ways.

i.e., (t, t), (w, w), (th, th), (f, f), (s, s)

$\mathrm{P}($ both will reach on same day $)=\frac{5}{25}=\frac{1}{5}$

(ii) They can reach on consecutive days in these 8 ways - (t, w), (w, th), (th, f), (f, s), (w, t), (th, w), (f, th), (s, f).

Therefore, $P$ (both will reach on consecutive days) $=\frac{8}{25}$

(iii) $P$ (both will reach on same day) $=\frac{1}{5}[($ From (i) $]$

$P$ (both will reach on different days) $=1-\frac{1}{5}=\frac{4}{5}$