Question

The mean temperature of a town in a certain week was ${25}^{\circ }$ C If the mean temperature of Monday, Tuesday,Wednesday, and Thursday was ${23}^{\circ }$C and that of Thursday, Friday. Saturday and Sunday was ${28}^{\circ }$C Fing the temperature on Thursday

• A. ${23}^{\circ }$
• B. ${27}^{\circ }$
• C. ${28}^{\circ }$
• D. ${29}^{\circ }$

Answer 1

The correct option is D ${29}^{\circ }$

mean temperature of the week =${25}^{\circ }$C
$\therefore$ Sum of the temperatures of 7 days = $7\times {25}^{\circ }C={175}^{\circ }C$ Sum of temperatures on Monday , Tuesday,Wednesday,And Thursday=$4\times {23}^{\circ }C={92}^{\circ }C$
Sum of temperatures on Thursday, Friday, Saturday, and Sunday=$4\times {28}^{\circ }C={112}^{\circ }C$
Sum of temperatures from Monday to sunday and Thursday = ${92}^{\circ }C+{112}^{\circ }C={204}^{\circ }C$ Temperature on thursday=${204}^{\circ }C-{175}^{\circ }={29}^{\circ }C$