Question : The average marks of a class of 35 children is 35. The marks of one of the students, who got 35, were incorrectly entered as 65. What is the average of the class?

Option 1: 33.76

Option 2: 34.14

Option 3: 35.24

Option 4: 36.50

Question : The average mark of a class of 35 children is 35. The marks of one of the students, who got 35, were incorrectly entered as 65. What is the correct average of the class?

Option 1: 33.76

Option 2: 34.14

Option 3: 35.24

Option 4: 36.50

Question : The average weight of some students in a class was 60.5 kg. When 8 students, whose average weight was 65 kg, joined the class, then the average weight of all the students increased by 0.9 kg. The number of students in the class, initially, was:

Option 1: 37

Option 2: 42

Option 3: 32

Option 4: 40

Question : The average weight of 40 children in a class is 36.2 kg. When three more children of weights 42.3 kg, 39.7 kg, and 39.5 kg join the class, the average weight of the 43 children in the class is:

Option 1: 39.2 kg

Option 2: 36.5 kg

Option 3: 38.35 kg

Option 4: 37.3 kg

Question : The average age of 10 students and their class teacher is 17 years. If the age of the class teacher is excluded, the average age of the 10 students is reduced by 2 years. What is the age of the class teacher?

Option 1: 38 years

Option 2: 36 years

Option 3: 37 years

Option 4: 35 years

Question : The average mark obtained by 140 students in an examination is 90. If the average mark of passed students is 120 and the number of students who failed in the examination is 90, then what are the average marks of students who failed in the examination?

Option 1: 60

Option 2: 73.33

Option 3: 85.66

Option 4: 88