Question : While tabling marks scored in an examination by the students of a class, by mistake the marks scored by one student got recorded as 93 in place of 63, and thereby the average marks increased by 0.5. What was the number of students in the class?

Option 1: 60

Option 2: 20

Option 3: 15

Option 4: 30

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 15 students in a class increases by 1.5 kg when one of the students, who weighs 40 kg, is replaced by a new student. What is the weight in kg of the new student?

Option 1: 64.5 kg

Option 2: 56 kg

Option 3: 60 kg

Option 4: 62.5 kg

Question : Class 10, consisting of 40 students, took a science test. 30 students had an average score of 95. The other students had an average score of 85. What is the average score of the whole class?

Option 1: 92.3

Option 2: 92.5

Option 3: 92.4

Option 4: 92.2

Question : The average age of 40 students in a class is 16 years. After the admission of 10 new students to the class, the average becomes 15 years. If the average age of 5 of the new students is 11 years, then the average age (in years) of the remaining 5 new students is:

Option 1: 10

Option 2: 12

Option 3: 16

Option 4: 11

Question : A class has five sections that have 25, 30, 40, 45, and 60 students, respectively. The pass percentages of these sections are 20%, 30%, 35%, 40%, and 100% respectively. The pass percentage of the entire class is:

Option 1: 87%

Option 2: 63%

Option 3: 53%

Option 4: 79%