A) 4
B) 6
C) 5
D) 3
Correct Answer: C
Solution :
\[1-{{\left( \frac{2}{3} \right)}^{n}}\,>\,\,\frac{5}{6}\] \[\Rightarrow \,\,\,\frac{1}{6}>{{\left( \frac{2}{3} \right)}^{n}}\,\] \[\Rightarrow \,\,\,{{3}^{n}}>{{2}^{n}}\times 6\] \[\Rightarrow \,\,\,{{3}^{n-1}}>{{2}^{n+1}}\] \[n=5\] (minimum)You need to login to perform this action.
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