Question

The average temperature from Monday to Thursday is ${48}^{\circ }C$ and from Tuesday to Friday is ${52}^{\circ }C$. If the temperature on Monday is ${42}^{\circ }C$, what was it on Friday?

• A. ${52}^{\circ }$
• B. ${55}^{\circ }$
• C. ${58}^{\circ }$
• D. ${51}^{\circ }$
• E. None of these

Answer 1

The correct option is C ${58}^{\circ }$

Temperature on Monday + Tuesday + Wednesday + Thursday $=4\times {48}^{\circ }={192}^{\circ }$
Temperature on Monday = ${42}^{\circ }$
Tuesday + Wednesday + Thursday + Friday
= $4\times {52}^{\circ }={208}^{\circ }$
$\therefore$ Friday's temperature = ${208}^{\circ }-{150}^{\circ }={58}^{\circ }$