Data on the value of a student's repetition: 70, 75, 80, 65, 70, 75, 85, 90, 90, 80 What is the average value?

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Data on the value of a student's repetition:
70, 75, 80, 65, 70, 75, 85, 90, 90, 80
What is the average value?

Answer:

[tex] \frac{total \: data}{the \: amout \: of \: data} [/tex]

[tex] \frac{70 + 75 + 80 + 65 + 70 + 75 + 85 + 90 + 90 + 80}{10} [/tex]

[tex] \frac{780}{10} [/tex]

[tex]780 \div 10[/tex]

[tex]78[/tex]