Question

6th In class wil
seventh ten
students marks in Mathematics: 80,60,70,60,40
SO, TO, 65,55,70. Find mean.
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Answer 1

Answer:

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Step-by-step explanation:

$mean = \frac{sum \: \: of \: \: observations}{no. \: \: of \: \: observations} \\ \\ mean = \frac{80 + 60 + 70 +60 + 40 + 80 + 70 + 65 + 55 + 70}{10} \\ \\ mean = \frac{650}{10} \\ \\ mean = 65$