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If the mean of five numbers is 20, what is their total sum? (2020)

Practice Questions

Q1
If the mean of five numbers is 20, what is their total sum? (2020)
  1. 80
  2. 100
  3. 120
  4. 140

Questions & Step-by-Step Solutions

If the mean of five numbers is 20, what is their total sum? (2020)
  • Step 1: Understand what 'mean' means. The mean is the average of a set of numbers.
  • Step 2: Know the formula for mean: Mean = Total Sum / Number of Items.
  • Step 3: Identify the mean given in the question, which is 20.
  • Step 4: Identify the number of items, which is 5 (since there are five numbers).
  • Step 5: Rearrange the formula to find Total Sum: Total Sum = Mean * Number of Items.
  • Step 6: Substitute the values into the formula: Total Sum = 20 * 5.
  • Step 7: Calculate the total sum: 20 * 5 = 100.
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