Question

jasmine surveyed her friends to find out what types of books they read for a book club in june. the results are shown in the bar graph below. based on the bar graph, predict the number of mystery books that jasmines friends will read in july if the total number of books is expected to be 90

Explanation:

Step1: Calculate total number of friends surveyed in June

Count the number of friends for each book - type in June from the bar - graph: \(9 + 9+4 + 8+14 + 12=56\)

Step2: Calculate the proportion of friends who read mystery books in June

The number of friends who read mystery books in June is 14. The proportion \(p=\frac{14}{56}=\frac{1}{4}\)

Step3: Predict the number of mystery books in July

If the total number of books in July is 90, and assuming the proportion remains the same, the number of mystery books \(n = 90\times\frac{1}{4}=22.5\approx23\)

Answer:

23