Question
Download Solution PDFThe average of 10 results is 50. If the average of first five results is 49 and that of the last five is 65, find the fifth result.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The average of 10 results = 50
The average of first five results = 49
The average of the last five results = 65
Formula used:
Average = Sum of results / Number of results
Calculation:
The sum of the 10 results = = 50 × 10 = 500
The sum of the first five results = 49 × 5 = 245
The sum of the last five results = 65 × 5 = 325
Fifth result = Sum of the first five + Sum of the last five - Sum of all 10
⇒ 245 + 325 - 500 = 70
∴ Option (4) is the correct answer.
Last updated on Mar 19, 2025
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