2. a) The average age of 5 students is 9 years. Out of them the ages of 4 students are 5, 7, 8 and 15 years. What is the age of the remaining student? ​

2 a The average age of 5 students is 9 years Out of them the ages of 4 students are 5 7 8 and 15 years What is the age of the remaining student class=