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)
P (both will reach on same day) =5/25 = 1/25
(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) = 8/25
(iii) P (both will reach on same day) = 1/5
[(From (i)]
P (both will reach on different days) = 1- 1/5 = 4/5