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The mean of 20 observations is …

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The mean of 20 observations is 12. If each observation is increased by 5, then find the new observation.

Posted by Maria Jaleel 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Since mean of 20 observations is 12
Sum of the 20 observations = 12 {tex}\times{/tex} 20 = 240
New sum of 20 observations = 240 +(5 x 20) = 420 + 100 = 520
New mean = 520/20 = 26

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CBSE > Class 10 > Mathematics