strawberryycow strawberryycow

22-03-2021
Mathematics

contestada

David has earned the following test
grades: 89, 96, 99, 85. What is the
grade David has to earn on his 5th test to maintain a test
average of 90?

Respuesta :

koloabbaabubakar koloabbaabubakar

22-03-2021

Answer:

81

Step-by-step explanation:

Required average= 90

let the required grade be x

Average= Sum of n numbers

90= 89+96+99+85+x divide by 5

450= 369+x

x = 450-369

x=81

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