question_answer

The mean high temperature of the first four days of a week is \[{{25}^{{}^\circ }}C\]whereas the mean of the last four days is \[{{25.5}^{o}}C\]. If the mean temperature of the whole week is \[{{25.2}^{o}}C\] then the temperature on the 4th day is

A)  \[25.5{{\,}^{{}^\circ }}C\]                       

B)  \[{{25}^{{}^\circ }}C\]

C) \[{{25.2}^{{}^\circ }}C\]            

D)       \[{{25.6}^{{}^\circ }}C\]