The average of 15 results is 50. If the average of first 8 results is 48 and that other last 8 is 53 find the eighth result.
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The eighth result is equal to 58.
Step-by-step explanation:
Given,
The average of 15 results = 50, the average of first 8 results = 48 and
The average of last 8 results = 53
To find, the eighth result = ?
We know that,
The eighth result = (The sum of first 8 results + The average of lastt 8 results) - The sum of 15 results
= (8 × 48 + 8 × 53) - 15 × 50
= (384 + 424) - 750
= 808 - 750
= 58
Thus, the eighth result is equal to 58.
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