1. There are 12 buses running between Delhi and Agra. In how many ways

can a man plan his journey from Delhi to Agra and back? In how many
ways can he go from Delhi to Agra and return by a different bus?

Plz answer ASAP .

(1) He can go to from Delhi to Agra in 12 ways (He can use any of the 12 buses)

He can come back from Agra to Delhi in 12 ways (He can use any of the 12 buses).

Total number of ways = 12 x 12 = 144.

(2) He can go to from Delhi to Agra in 12 ways (He can use any of the 12 buses)

He can come back from Agra to Delhi in 11 ways (He cannot use the bus in which he went to Agra and hence can use any of the 11 buses).

Total number of ways = 12 x 11 = 132.

  • 5
What are you looking for?