Question

the average of three numbers is 70 the first number is twise the second and the second number is twice the third find the first number
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Answer 1

FIRST NUMBER=30

EXPLANATION

Average=70

First number=x

Second number=2*x=2x

Third number=2x*2=4x

Therefore,

x+2x+4x/3=70

7x/3=70

7x=210

x=30

FIRST NUMBER=x=30

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