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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
Survey: $63%$ like cheese, $76%$ like apples. If $x%$ like both?
Solution
Using inclusion–exclusion:$63 + 76 - x \le 100$
$139 - x \le 100$
$x \ge 39$
Max value of $x$ cannot exceed minimum of both percentages
→ $x \le 63$
Thus $39 \le x \le 63$.
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