The average age of a group of 20 students is calculated as 18 years. However, during the calculation, the ages of two students, 16 years and 15 years,...
Question
The average age of a group of 20 students is calculated as 18 years. However, during the calculation, the ages of two students, 16 years and 15 years, were mistakenly taken as 18 years and 20 years respectively. What is the correct average age of the group?