Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationnPr & nCrMedium2 minPYQ_2020

MathematicsMediumsingle choice

The number of possible outcomes in a throw of n ordinary dice in which at least one of the dice shows an odd number is

Options:

Answer:

Solution:

Total number of ways $= 6 \times 6 \times \dots\dots$ to $n$ times $= 6^{n}$ Total number of ways to show only even number $= 3 \times 3 \times \dots\dots$ to $n$ times $= 3^{n}$ $∴$ required number of ways $= 6^{n} - 3^{n}$

Stream:BITSATSubject:MathematicsTopic:Permutation & CombinationSubtopic:nPr & nCr

⏱ 2mℹ️ Source: PYQ_2020

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