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We should be her score in the seventh test to achieve an average of 80

We Should Be Her Score In The Seventh Test To Achieve An Average Of 80 class=

Sagot :

Explanation

To score an average of 80 after the 7th she needs to have 80*7=560 in total, then:

[tex]\begin{gathered} 98+82+79+63+77+80+x=560 \\ 479+x=560 \\ x=560-479 \\ x=81 \end{gathered}[/tex]

Answer

81

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