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24 Jan 2026, 18:37
Kudos
Bookmarks
The otherway around is also the same. We only have to choose other 2 from remaining 5 because the question is conditional.
Kashu18
02 Feb 2026, 01:27
Kudos
Bookmarks
total = 7c4
fix both as they can be uniqely identified from rest
K J _ _
remaining can only be chosen in 5c2 ways.
Hence, 5c2/7c4 = 2/7
(Note to myself: Choosing 2 from 4 position (4c2) is not the same thing as choosing remaining positions from remaining 5, think 4c2 will never change even if total remaining has to be filled from 10 or 100 instead of 5)
fix both as they can be uniqely identified from rest
K J _ _
remaining can only be chosen in 5c2 ways.
Hence, 5c2/7c4 = 2/7
(Note to myself: Choosing 2 from 4 position (4c2) is not the same thing as choosing remaining positions from remaining 5, think 4c2 will never change even if total remaining has to be filled from 10 or 100 instead of 5)
ynaikavde
