A set of 19 data values has average 14. When a 20th data value is added, the average is now 14.4. What was the 20th value?
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Answered by
0
Answer:
0.72
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Answered by
0
Answer:
20th value added is 0.8
Step-by-step explanation:
average of 19 value = 14
we know, average is calculated by (sum of observation / 2)
therefore, the sum of 19 values will be = 14 ×2 = 28
when 20th data is added, average value = 14.4
so, let us say that the 20th data entered is x
then, (28 + x)/2 = 14.4
=> 28 + x = 14.4 × 2
=> x = 28.8 - 28
=>. x = 0.8. ans.
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