Question : The average age of 30 students is 20 years and the average age of 20 other students is 30 years. The average age of the total number of students is:

Option 1: 24 years

Option 2: 25 years

Option 3: 48 years

Option 4: 50 years

Question : The average age of 9 girls is 16 years. The average age of 11 boys is 26 years. What is the average age of all these boys and girls taken together?

Option 1: 22 years

Option 2: 23 years

Option 3: 22.5 years

Option 4: 21.5 years

Question : The average age of 29 students in a class is 26 years. If the age of the teacher is also included, the average age of the class becomes 26.4 years. Find the age of the teacher.

Option 1: 36 years

Option 2: 38 years

Option 3: 42 years

Option 4: 32 years

Question : The average age of 5 children is 10 years. If two more children of ages 11 years and 16 years join, then what will be the new average age?

Option 1: 11 years

Option 2: 10 years

Option 3: 13 years

Option 4: 12 years

Question : The average age of four brothers is 24 years. If their father is included, the average is increased by 6 years. Find the age of the father (in years).

Option 1: 50 years

Option 2: 52 years

Option 3: 54 years

Option 4: 55 years