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Explain Solution R.D. Sharma Class 12 Chapter 30 Probability  Exercise Multiple Choice Questions  Question 61 Maths Textbook Solution.

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Answer:(c)

Hint: You must know the rules of finding probability.

Given: A card is picked at random from a 52 cards,

Given that picked card is queen

Solution: number of spade cards = 13

Number of queen in spade set = 1

n(spade queen) ={ }^{13} C_{1}

n(Total number of cases) ={ }^{52} C_{1}

\begin{aligned} &=\frac{{ }^{13} C_{1}}{{ }^{52} C_{1}} \\ &=\frac{13}{52} \\ &=\frac{1}{4} \end{aligned}

 

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