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Anton [14]
3 years ago
14

Carlos has scored 83, 81, and 73 on his previous three tests. What score does he need on his next test so that his average (mean

) is 83 ?
Mathematics
1 answer:
disa [49]3 years ago
8 0

Answer:

95

Step-by-step explanation:

let x be his mark in the fourth test, then

mean = \frac{83+81+73+x}{4} = 83 ( multiply both sides by 4 )

83 + 81 + 73 + x = 332

237 + x = 332 ( subtract 237 from both sides )

x = 95


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