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<h2 class="wp-block-heading" id="h-introduction">Introduction</h2>
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<p>Welcome to today’s JEE Mathematics tutorial! In this session, we’re diving into a classic probability problem from past questions — a must-know topic for anyone preparing for <strong>JEE Main or Advanced</strong>.</p>
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<p>Let’s get started with the questions and answers.</p>
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<h2 class="wp-block-heading" id="h-question-1">Question 1</h2>
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<p><strong>Question</strong>:<br>Two balls are selected at random, one after the other, <strong>without replacement</strong>, from a bag containing 4 white balls and 6 black balls.<br>If the probability that the <strong>first selected ball is black</strong>, given that the <strong>second selected ball is also black</strong>, is m/m, gcd (m,n) =1, what is the value of m+n</p>
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<h2 class="wp-block-heading">Step-by-Step Breakdown</h2>
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<h3 class="wp-block-heading">Step 1: Total Number of Balls</h3>
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<p>We are given:</p>
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<li>4 white balls</li>
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<li>6 black balls<br>Total = 4+6= 10 balls</li>
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<h2 class="wp-block-heading" id="h-final-answer-14">Final Answer: 14</h2>
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<p><mark style="background-color:rgba(0, 0, 0, 0)" class="has-inline-color has-vivid-cyan-blue-color"><strong>Watch more educational videos and past questions:</strong> </mark><a href="https://youtube.com/@allcbts">https://youtube.com/@allcbts</a></p>
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<h2 class="wp-block-heading" id="h-why-this-matters-in-jee-exams">Why This Matters in JEE Exams.</h2>
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<li>Questions like this test your <strong>grasp of conditional probability</strong> — a high-yield concept in both JEE Main and Advanced.</li>
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<li>Knowing how to deal with <strong>“without replacement”</strong> is essential for mastering combinatorics and probability.</li>
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<p><strong><mark style="background-color:rgba(0, 0, 0, 0)" class="has-inline-color has-vivid-cyan-blue-color">Related Videos:</mark></strong></p>
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<li><a href="https://allcbts.com/national-common-entrance-mathematics-questions/">National Common Entrance Mathematics Questions</a></li>
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<h2 class="wp-block-heading" id="h-related-keywords">Related Keywords.</h2>
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<p>JEE probability tricks, JEE conditional probability question, JEE Mathematics past questions, without replacement probability, JEE 2025 math solved problems, JEE Advanced probability formula, how to solve probability in JEE, black and white balls probability JEE</p>
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