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A bar graph shows the number of books sold in four months: January (30), Februar

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Question: A bar graph shows the number of books sold in four months: January (30), February (45), March (25), April (50). What is the average number of books sold per month?

Options:

  1. 37.5
  2. 40
  3. 45
  4. 35

Correct Answer: 37.5

Solution: 

Total books sold = 30 + 45 + 25 + 50 = 150. Average = 150 / 4 = 37.5.

A bar graph shows the number of books sold in four months: January (30), Februar

Practice Questions

Q1
A bar graph shows the number of books sold in four months: January (30), February (45), March (25), April (50). What is the average number of books sold per month?
  1. 37.5
  2. 40
  3. 45
  4. 35

Questions & Step-by-Step Solutions

A bar graph shows the number of books sold in four months: January (30), February (45), March (25), April (50). What is the average number of books sold per month?
  • Step 1: Write down the number of books sold in each month: January (30), February (45), March (25), April (50).
  • Step 2: Add the number of books sold in all four months together: 30 + 45 + 25 + 50.
  • Step 3: Calculate the total: 30 + 45 = 75, then 75 + 25 = 100, and finally 100 + 50 = 150.
  • Step 4: Count the number of months: There are 4 months (January, February, March, April).
  • Step 5: To find the average, divide the total number of books sold (150) by the number of months (4): 150 / 4.
  • Step 6: Calculate the average: 150 divided by 4 equals 37.5.
  • Averages – Understanding how to calculate the average by summing values and dividing by the count of values.
  • Data Interpretation – Interpreting data from a bar graph to extract numerical values for calculations.
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