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Abbydquiambaogo
Answered

Out of 100 items test mary score 71, 77 and 80 on here tree exams what is the least possible score does she need on the last exam to get an average of not less than 80?​

Sagot :

Sabriarepollo011909go

Answer:

92

Step-by-step explanation:

because

71

77

78

+92

--------

320

then

320

÷. 4

----------

80

Dendendeniiigo

Answer:

92

Step-by-step explanation:

80 x 4 = 71 + 77 + 80 + n

320 = 228 + n

320 - 228 = n

92 = n

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