A) 20, 10, 5
B) 4, 2, 1
C) 36, 18, 9
D) 16, 8, 4
Correct Answer: C
Solution :
[c] Let third number =x Then, Second number = 2x First number = 4 x 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 = 9You need to login to perform this action.
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