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There are 5 roads leading to a town from a village. The number of different ways in which a villager can go to the town and return back is: 

(a) 5 

(b) 10 

(c) 25 

(d) 20

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(c) 25

Number of ways of going from the village to the town = Number of roads between them = 5 

Since all the 5 roads can be used for going back from town to the village, so number of ways of returning = 5. 

∴ Total number of ways of going to the town and coming back to the village = 5 × 5 = 25.

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