CSAT 2023

Q. What is the number of selections of 10 consecutive things out of 12 things in a circle taken in the clockwise direction?

(a) 3
(b) 11
(c) 12
(d) 66
Correct Answer: (c) 12

Question from UPSC Prelims 2023 CSAT

Explanation :

10 Consecutive Selections in a Circle

When you select 10 out of 12 things in a circle, you are actually selecting a starting point and then counting the next 9 things in the clockwise direction.

Since there are 12 things in the circle, there are 12 possible starting points. Therefore, there are 12 different ways to select 10 consecutive things out of 12 things in a circle taken in the clockwise direction.

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