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In a row of 20 seats, in how many ways can 3 blocks of consecutive seats with 5 seats in each block be selected?Please explain each step in a layman`s term.Thanks.

In a row of 20 seats, in how many ways can 3 blocks of consecutive seats with 5 seats in each block be selected?Please explain each step in a layman`s term.Thanks.

Grade:8

3 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
4 years ago
PFA228-120_8.PNG
mac
10 Points
4 years ago
Thank you sir for the solution and your time.I`m little confused here or perhaps obtuse because the question talks about selection.Here is what I have understood from your solution :The different positions of each block represents different blocks right? This leds to arrangement as you did in your solution . Hope my understanding is correct .
Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
4 years ago
Placement of those blocks will actually mean that you have selceted those 5 consecutive chairs at different positions.

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