SOLUTION: the average of 5 test scores is a 78. what is the fith score if the first 4 scores are 71 92 68 84

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Question 771336: the average of 5 test scores is a 78. what is the fith score if the first 4 scores are 71 92 68 84
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
(71+92+68+84+x)/5 = 78

(315+x)/5 = 78

315+x = 78*5

315+x = 390

x = 390-315

x = 75

The fifth score is 75