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A collection of 31 'distinct numbers has...

A collection of 31 'distinct numbers has 18 as their median. When a number is added to this collection, the median remains the same. What number is added?

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The correct Answer is:
18
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ICSE-DATA HANDLING AND MEASURES OF CENTRAL TENDENCY-EXERCIES 18.1
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  3. A collection of 20 'distinct numbers have 13 as their median. A number...

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