CAT Full QA item 27: Find the arithmetic mean of 12 and 8.
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(12+8)/2=10.0.
Practice CAT Quantitative Ability MCQ questions with answers and explanations.
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(12+8)/2=10.0.
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Increase/base ×100 = 25%.
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The units digit follows from 8³.
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15²+17²=514.
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Area=16×20=320.
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By Vieta, root sum is the coefficient 21.
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(18+7)/2=12.5.
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Area=4×3=12.
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3²+19²=370.
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By Vieta, root sum is the coefficient 23.
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(17+10)/2=13.5.
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Increase/base ×100 = 25%.