Mathematics - Probability Question with Solution | TestHub

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

MathematicsMediumsingle choice

Four identical dice are rolled once. Probability that atleast 3 different numbers appear on them is

Answer:

Solution:

'aaaa' can appear in $^{6} C_{1}$ ways

'aaab' can appear in $2 (^{6} C_{2}) - 30$

' $aab b^{'}$ can appear in $^{6} C_{2} = 15$

' $aab c$ 'can appear in $3 (^{6} C_{3}) = 60$

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

⏱ 2mℹ️ Source: QB

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