A student scored 80, 90, and 70 in three subjects. If the fourth subject is scor

Practice Questions

Q1
A student scored 80, 90, and 70 in three subjects. If the fourth subject is scored 100, what will be the weighted average of the scores?
  1. 85
  2. 90
  3. 95
  4. 80

Questions & Step-by-Step Solutions

A student scored 80, 90, and 70 in three subjects. If the fourth subject is scored 100, what will be the weighted average of the scores?
  • Step 1: Add all the scores together. The scores are 80, 90, 70, and 100.
  • Step 2: Calculate the total: 80 + 90 + 70 + 100 = 340.
  • Step 3: Count the number of subjects. There are 4 subjects.
  • Step 4: Divide the total score by the number of subjects: 340 / 4.
  • Step 5: Calculate the result: 340 / 4 = 85.
  • Weighted Average Calculation – The process of finding the average of a set of numbers, where each number may contribute differently to the final average.
  • Basic Arithmetic – The fundamental operations of addition and division used to calculate the average.
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