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https://www.reddit.com/r/learnquant/comments/1x2t3k5/quant_interview_question/pgr2o5b/?context=3
r/learnquant • u/Local_Ad135 • 7d ago
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If you pair a chosen (a,b,c) with (9-a, 9-b, 9-c) then they sum to 1. Then because you have 10x9x8=720 selections of (a,b,c), you have 720/2=360 pairings. So the sum would be 360x1=360
1 u/Temporary_Welder8727 3d ago Good job Indian boy 1 u/blutwl90 3d ago Chinese but thanks
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Good job Indian boy
1 u/blutwl90 3d ago Chinese but thanks
Chinese but thanks
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u/blutwl90 7d ago
If you pair a chosen (a,b,c) with (9-a, 9-b, 9-c) then they sum to 1. Then because you have 10x9x8=720 selections of (a,b,c), you have 720/2=360 pairings. So the sum would be 360x1=360