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Jose wants to have an average of 80 for his 4 exams. Each exam is scored...

Jose wants to have an average of 80 for his 4 exams. Each exam is scored on a scale of O to 100. His first three exam scores are: 87, 72, 85. What does Jose need to score on the 4th exam to have a mean of 80 on all 4 exams?
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No op Exams n = 4 Average of marks of u exame is <n>= 80 Given, x = 87, X2 = 72, X3=85 Now, Mean (Average) of Marks is given

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