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<html><body><h2 id="content-id-0186937254-2"><b>Average Questions Overview</b></h2><p>Average 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 Average Questions.</p><h2 id="content-id-6037591824-3"><b>Question On Average </b></h2>In a primary school, the number of boys is 25% more than the number of girls. The total strength of the school is exactly 45 students, and the average height of the entire school is x cm. The average height of boys is (x - 12) cm, whereas the average height of the girls is exactly 165 cm. Find the numerical difference between the value of x and the total number of girls in the school.
<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 : 45 Seconds </h3></div></div><h2 id="content-id-7523049618-4"><b> Average Questions Options</b></h2><ol><li><p>120</p>
</li><li><p>125</p>
</li><li><p>130</p>
</li><li><p>135</p>
</li><li><p>110</p>
</li></ol> <h2 id="content-id-2153479068-5"><b> Average Questions Solution</b></h2><p>The correct answer is <strong>option 3 </strong>i.e. <strong>130</strong>.</p>

<p>Let girls = 4k</p>

<p>Boys = 5k</p>

<p>Total students = 45</p>

<p>9k = 45</p>

<p>k = 5</p>

<p>Girls = 20</p>

<p>Boys = 25</p>

<p>Using weighted average,</p>

<p>45x = 25(x − 12) + 20 × 165</p>

<p>45x = 25x − 300 + 3300</p>

<p>20x = 3000</p>

<p>x = 150</p>

<p>Required difference</p>

<p>= x − girls</p>

<p>= 150 − 20</p>

<p>= 130</p>
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The correct answer is option 3 i.e. 130. - Average Questions are asked in Ssc Chsl exams and your question has been explained by experts like Neetu Mam.

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