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Question

Harry measured the temperature at 2 p.m. at the same spot in his garden and recorded his results to the nearest degree ( oF) for each day of the year (365 days). On approximately what percent of the days was the temperature above 40 oF but less than 70 oF


A
60 %
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B
70%
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C
80 %
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D
90 %
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Solution

The correct option is B 70%
Number of days for which the temperature was above 40 oF but less than 70 oF is found by adding the frequencies for the groups 40 to 50, 50 to 60, and 60 to 70.

Which is (approximately) 130 + 70 + 50 = 250

As a percentage of the year, this is: 250365×100=68.5%
or approximately 70%

Mathematics

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