Question

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the scores of 50 nurses taking a state board exam were recorded. a frequency distribution of these scores is shown below.
how many nurses had scores that were less than 90?
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Explanation:

Step1: Identify the frequencies for scores less than 90

From the graph, the frequencies for scores in the intervals (assuming the intervals are 50 - 60, 60 - 70, 70 - 80, 80 - 90) are 5, 8, 15, 18.

Step2: Sum up the frequencies

$$5 + 8+15 + 18$$

$$=13 + 15+18$$

$$=28 + 18$$

$$=46$$

Answer:

46