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95,89,91, 93 ,x.

Are the five scores , 'x' being unknown and to find.

Hence

(95 + 89 + 91 + 93 + x) / 5 = 93

Add the four known values.

(368 + x) / 5 = 93

Multiply both sides by '5'

368 + x = 465

Subtract '368' from both sides

x = 97

So you must score '97' in your final test to bring your mean/average to '93'.

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97

Q: If you have a score of 95 89 91 and 93 what score must you get on your final test to raise your average to 93?

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If average for 3 = 84 then sum for 3 = 84*3 = 252. If average for 4 = 88 then sum for 4 = 88*4 = 352 so required score in quiz 4 = 100.

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