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The mean temperature of Monday to Wednesday was 37°C and of and of Tuesday to Thursday was 34°C. If the temperature on Thursday was $\Large\frac{4}{5}$ that of Monday, the temperature of Thursday was-

A. 34°C B. 35.5°C C. 36°C D. 36.5°C Answer: Option C
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Solution(By Apex Team)

M + T + W = (37 × 3)°C = 111°C…..(i) T + W + Th = (34 × 3)°C = 102°C…..(ii) Subtracting (ii) from (i), we get: $\begin{aligned}&\Rightarrow\mathrm{M}-\mathrm{Th}=9^{\circ}\mathrm{C}\\ &\Rightarrow\mathrm{M}-\frac{4}{5}\mathrm{M}=9\\ &\Rightarrow\frac{1}{5}M=9\\ &\Rightarrow\mathrm{M}=45\\ &\therefore\text{ Temperature on Thursday }\\ &=\left(\frac{4}{5}\times45\right)^{\circ}\mathrm{C}\\ &=36^{\circ}\mathrm{C}\end{aligned}$

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