The average temperature for the first 4- days of a week is 40.2-degree Celcius and that of the last 4 days is 41.3-degree Celcius If the average temperature for the whole week is 40.6-degree Celcius then the temperature on the fourth day is-

Bangladesh Bank বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২ গণিত গড় (Average) 2022