In a week, the average temperature of Sunday and Monday is 37.2°C. The average temperature of Tuesday and Wednesday is 39.4°C. Find the temperature on Sunday if the average temperature of Monday, Tuesday and Wednesday is 38.1°C ?

38.9°C

Sum of temperature of Sunday and Monday = 2 × 37.2 = 74.4°C

Sum of temperature of Tuesday and Wednesday = 2 × 39.4 = 78.8°C

Sum of temperature of Monday , Tuesday , Wednesday = 3 × 38.1 = 114.3°C

Temperature of Sunday = ( 78.8 + 74.4) - 114.3 = 38.9°C