The average of numbers is 30 and the first two numbers are 25 and 31 .Find the third number. *
36
34
i will give 95 points
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The average of 6 numbers is 30. If the average of the first four is 25 and that of the last three is 35, the fourth number is
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30
(25+31+x)÷3=30
(25+31+x)=30×3
(25+31+x)=90
56+x=90
x=90-56
x=34.
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