Question

EXERCISE 5B
1. There are 30 buses running between Delhi and Agra. In how many ways can
a man go from Delhi to Agra and return by a different bus?​

Answer 1

Answer:

870

Step-by-step explanation:

at the time of going u have 30 choices

but at the time of coming back 29 as different keyword is written in question so

30×29=870

Answer 2

Step-by-step explanation:

from delhi to agra = 10 ways

return = 9 ways ( can't travel back from the same bus)

so in all = 10×9= 90 ways

hope it helps you...