Mathematics - Probability Question with Solution | TestHub

MathematicsProbabilityGeneral (Event SS, Definitions, Odd against/Favour)Medium2 minQB

MathematicsMediuminteger

Two squares are chosen at random from small squares (one by one) drawn on a chess board and the chance that two squares chosen have exactly one corner in common is $\frac{k}{144}$ then $k =$

Answer:

Solution:

Total number of ways to select 2 unit squares $=^{64} C_{2}$

No.of ways of selecting squares which have a corner in common $= 98$

$∴ probability = \frac{98}{^{64} C _{2}} = \frac{7}{144} \Rightarrow k = 7$

Stream:JEESubject:MathematicsTopic:ProbabilitySubtopic:General (Event SS, Definitions, Odd against/Favour)

⏱ 2mℹ️ Source: QB

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