A) 20, 10, 5
B) 4, 2, 1
C) 36, 18, 9
D) 16, 8, 4
Correct Answer: C
Solution :
Let third number=x Then, Second number=2x First number=4x According to question \[\frac{\left( \frac{1}{x}+\frac{1}{2x}+\frac{1}{4x} \right)}{3}=\frac{7}{12}\] \[\therefore \,\,\,x=9\] \[\therefore \] First number\[=4x=4\times 9=36\] Second number\[=2x=2\times 9=18\] Third number\[=x=9\]You need to login to perform this action.
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