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  • Please solve RD Sharma class 12 chapter Probability exercise 30.1 question 1 maths textbook solution

Please solve RD Sharma class 12 chapter Probability exercise 30.1 question 1 maths textbook solution

Answers (1)

Answer:

 \frac{4}{7}

Hint:

 Use Formula

\text { Probability }=\frac{ \text { No. of events }}{\text { Total no. of events }}

Given,

ten cards in a box.

So, let

Total no. of cards,

S = { 1,2,3,4,5,6,7,8,9,10 }

Consider the given events,

   A       =   Total even no. appears on the card

B       =    No. from cards which is always more than 3

Therefore,

  A         =  { 2,4,6,8,10 }

  B          =  { 4,5,6,7,8,9,10 }

Now,

A \cap B = { 4,6,8,10 }

 Therefore,

Probability that card drawn in even no.

\begin{aligned} &P(A\mid B)=\frac{ \text { No. of elements of }A\cap B}{\text { Total no. of cards more than 3 }}\\ &\qquad \qquad=\frac{4}{7} \end{aligned}

Posted by

Gurleen Kaur

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