The frequency distribution of the 130 persons is given as:
What is the minimum age of the oldest 20 percent of the persons?
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Answer:
79.2
Step-by-step explanation:
20% of 130 is 26
26 lies just above the mid pt of the 60-100 age group which has 50 people
So, counting from behind the formula is
100 - (100-60)*26/50
= 79.2
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