if the mean of five observations is 18 .if one number is excluded,their mean ia 16 .find the excluded number
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i got 2 different answer 20 and 26
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Given:
→ The mean of 5 numbers is 18 if one number is excluded their men is 16.
Find:
→ Find the excluded number.
Calculations:
→ Mean of five numbers = 18.
→ 5 × 18
→ 90 -----(1)
We know, one number is excluded.
→ 4 × 16
→ 64 -----(2)
Subtracting equation (1) with equation (2), we get:
→ 90 - 64
→ 26
Therefore, 26 is the excluded number.
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