iran-konkur 2022 Q150

iran-konkur · Other · konkur-riazi_1401_specialized Combinations & Selection Pigeonhole Principle Application
150- At minimum, how many subsets must be chosen from the set $\{7, \ldots, 3, 2, 1\}$ so that we are certain that two subsets share a common element?
(4) $46$ (3) $45$ (2) $64$ (1) $65$
Place for Calculations
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Control Code: 122 A
Download of questions and descriptive answer keys of the national entrance exam from the Riazi Sara website
www.riazisara.ir
National University Entrance Exam for Universities and Higher Education Institutions of the Country --- Year 1401
Mathematical and Technical Sciences Group Specialized Exam
NotesResponse TimeTo Question No.From Question No.Number of QuestionsSubject
70 questions50 minutes19015140Physics
80 minutes30 minutes22019130Chemistry

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\textbf{150-} At minimum, how many subsets must be chosen from the set $\{7, \ldots, 3, 2, 1\}$ so that we are certain that two subsets share a common element?

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(4) $46$ \hfill (3) $45$ \hfill (2) $64$ \hfill (1) $65$

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\textbf{Place for Calculations}
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\textbf{Control Code: 122 \quad A}
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Download of questions and descriptive answer keys of the national entrance exam from the Riazi Sara website
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\textbf{www.riazisara.ir}
\end{center}

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\textbf{National University Entrance Exam for Universities and Higher Education Institutions of the Country --- Year 1401}
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\textbf{Mathematical and Technical Sciences Group}\\
\textbf{Specialized Exam}
\end{center}

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\begin{tabular}{|c|c|c|c|c|c|}
\hline
\textbf{Notes} & \textbf{Response Time} & \textbf{To Question No.} & \textbf{From Question No.} & \textbf{Number of Questions} & \textbf{Subject} \\
\hline
70 questions & 50 minutes & 190 & 151 & 40 & Physics \\
\hline
80 minutes & 30 minutes & 220 & 191 & 30 & Chemistry \\
\hline
\end{tabular}
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\textbf{Physics} \hfill $\leftarrow$ \textbf{122-A} $\rightarrow$ \hfill \textbf{Page 2}

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