MPSC Group C · Arithmetic and Numerical Skills
Average and weighted average.
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Q1 · Average · EASY
The average of five numbers is 42. If one number is excluded, the average of the remaining four numbers becomes 40. What is the excluded number?
Q2 · Average · EASY
The average weight of 30 students in a class is 45 kg. If the teacher's weight is included, the average becomes 46 kg. What is the weight of the teacher?
Q3 · Average · MEDIUM
The average of 12 numbers is 15. If each number is multiplied by 4 and then decreased by 5, what will be the new average?
Q4 · Average · MEDIUM
In a class of 50 students, the average marks in Mathematics is 65. If 10 students scored an average of 80 marks and another 15 students scored an average of 70 marks, what is the average marks of the remaining students?
Q5 · Average · HARD
The average age of a family of 6 members is 25 years. If the age of the youngest member is 5 years, what was the average age of the family at the time of the birth of the youngest member?