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<html><body><h2 id="content-id-9562430178-2"><b>Probability Questions Overview</b></h2><p>Probability Questions have a good weightage in the Ssc Chsl Exam and the type of question asked in Ssc Chsl exam is similar to the question mentioned below. It has been solved and explained by KD Live Experts under the guidance of Neetu Mam and they have tried to elaborate the concept used in Probability Questions.</p><h2 id="content-id-3816047295-3"><b>Question On Probability </b></h2>A bag contains three types of colored balls: Black, White, and Yellow.


	
	Number of black balls = x
	
	
	Number of white balls = x + 3
	
	
	Number of yellow balls = 4
	
	
	The difference between a two-digit number and the number formed by reversing its digits is 36. The sum of the digits is 12. The unit digit of this number is the value of x.
	



	
		
			Column-I (Questions)
			Column-II (Answers)
		
	
	
		
			(A) Find the probability that out of two randomly drawn balls from the bag (simultaneously), at least one ball is black.
			(P) 10/21
		
		
			(B) If three balls are drawn one by one with replacement, find the probability that the first two are black and the third one is yellow.
			(Q) 9/35
		
		
			(C) Find the probability of drawing two balls (simultaneously) such that either both are black or both are white.
			(R) 64/3375
		
	

<div class="row show--dificulty--bar" style="margin-top:8px;"><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex !important;border-right:0.1px solid #eee;"><h3 style="font-size:12px !important;">Difficulty : Easy </h3></div><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex;"><h3 style="font-size:12px !important;"> Average Time : 61 Seconds </h3></div></div><h2 id="content-id-9826340751-4"><b> Probability Questions Options</b></h2><ol><li><p>Only (B) → (R), (C) → (Q)</p>
</li><li><p>(A) → (R), (B) → (P), (C) → (Q)</p>
</li><li><p>(A) → (R), (B) → (Q), (C) → (P)</p>
</li><li><p>(A) → (P), (B) → (R), (C) → (Q)</p>
</li><li><p>(A) → (P), (B) → (Q), (C) → (R)</p>
</li></ol> <h2 id="content-id-6258409317-5"><b> Probability Questions Solution</b></h2><p>The correct answer is<strong> option 4</strong> i.e. <strong>(A) → (P), (B) → (R), (C) → (Q)</strong>.</p>

<p>Let the tens digit be t and the units digit be u.</p>

<p>(10t + u) − (10u + t) = 36</p>

<p>t − u = 4</p>

<p>Also,</p>

<p>t + u = 12</p>

<p>Solving,</p>

<p>u = 4</p>

<p>Hence, x = 4.</p>

<p>Therefore,</p>

<p>Black balls = 4, White balls = 7, Yellow balls = 4</p>

<p>Total balls = 15</p>

<p><strong>(A) At least one black ball</strong> = 1 − P(No black ball)</p>



<p>= 1 − <sup>11</sup>C<sub>2</sub> / <sup>15</sup>C<sub>2</sub></p>

<p>= 1 − 55/105</p>

<p>= 50/105</p>

<p>= 10/21</p>

<p>Hence, (A) → (P)</p>

<p><strong>(B) First two black and third yellow (with replacement)</strong> = 4/15 × 4/15 × 4/15</p>



<p>= 64/3375</p>

<p>Hence, (B) → (R)</p>

<p><strong>(C) Both black or both white</strong> = [<sup>4</sup>C<sub>2</sub> + <sup>7</sup>C<sub>2</sub>] / <sup>15</sup>C<sub>2</sub></p>



<p>= (6 + 21)/105</p>

<p>= 27/105</p>

<p>= 9/35</p>

<p>Hence, (C) → (Q)</p>

<p><strong>Final Matching:</strong></p>



<p>(A) → (P), (B) → (R), (C) → (Q)</p>
<h2 id="content-id-1750346289-6"><b> Probability Questions Tips and Tricks</b></h2><img loading="lazy" src="https://study.kdcampus.live/questions-blog-pdf/Probability_Questions_Tips_and_Tricks.png" alt="Probability Questions Tips and Tricks" height="260" width="480"><ol><li>Try to solve Probability Questions without taking any help from the solutions.</li><li>Probability Questions require proper usage of concept so firstly read the question thoroughly and then use the right concept. </li><li>In case you're not able to solve the question in less than 30 seconds in the exam then you should skip the question and move to the next question.</li></ol><h3><b>Daily Current Affairs </b></h3><img loading="lazy" src="https://study.kdcampus.live/questions-blog-pdf/Daily_Current_Affairs.png" alt="Daily Current Affairs" height="260" width="480"><p>KD Live is providing Current Affairs on a daily basis for SSC and a current affairs quiz too for the practice. 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The correct answer is option 4 i.e. (A) - Probability Questions are asked in Ssc Chsl exams and your question has been explained by experts like Neetu Mam.

A bag contains three type - Probability Questions for Ssc Chsl

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