jacckiie3071 jacckiie3071

18-07-2017
Mathematics

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The average of six numbers is 4. a seventh number is added and the new average is 5. what is the seventh number?

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texaschic101 texaschic101

18-07-2017

the average of 6 numbers is 4....
t/6 = 4.....t = 24 (the total of the 6 numbers)

(24 + x) / 7 = 5
24 + x = 35
x = 35 - 24
x = 11 <== ur 7th number

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