UPSC CSE Prelims - CSAT 2022 Q.77)There are 9 cups... #aptitude #upscaptitude #upsccsat

This question is from Series A Question paper of CSAT in UPSC Prelims 2022.

Q.77)There are 9 cups placed on a table arranged in equal number of rows and columns out of which 6 cups contain coffee and 3 cups contain tea. In how many ways can they be arranged so that each row should contain at least one cup of coffee?
a)18
b)27
c)54
d)81

#upsccsat #upsccsat2023 #upscaptitude #aptitude #logicalreasoning #timeandspeed #csatreasoningquestions #maths #upsccse

[tnpsctoppers]

6th position u have to CRT my dear
321, 312, 231, 213, 123, 132
U put 6th position is again 213 dear

[netheshn]

Lucid and clear explanation, Thankyou

[siddharthmishra]

Why not using permutations & combination in this question

[divyachudasama]

Hi can you please simplify more. I was not able to connect.