question_answer

The mean temperature of Day 1, Day 2 and Day 3 is \[40{}^\circ C\]. The mean temperature of Day 2, Day 3 and Day 4 is \[41{}^\circ C\]. If the temperature of Day 4 is \[30{}^\circ C,\] then the temperature on Day 1 is:

A)  \[31{}^\circ C\]                        

B)  \[33{}^\circ C\]

C)  \[41{}^\circ C\]                   

D)  \[27{}^\circ C\]