1) $\frac{1}{4}+\frac{1}{4 \times 5}+\frac{1}{4 \times 5 \times 6}$ correct to 4 decimal place is A) 0.3075 B) 0.3082 C) 0.3083 D) 0.3085 Answer: Option CExplanation:$\frac{1}{4}+\frac{1}{4\times5}+\frac{1}{4\times5\times6}=\frac{1}{4}(1+\frac{1}{5}+\frac{1}{30})=\frac{1}{4}(\frac{30+6+1}{30})=\frac{1}{4}\times\frac{37}{30}$ $=\frac{37}{120}=0.3083 $
