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The average age of 25 students in class A is 15 years, that of 30 students in class B is 12 years and that of 35 students in class C is 18 years. Find the average age of students of all the three classes together. (Round off your answer upto two decimal places.)
    Correct answer is '15.17'. Can you explain this answer?
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    Verified Answer
    The average age of 25 students in class A is 15 years, that of 30 stud...
    Average age = (25 x 15 + 30 x 12 + 35 x 18)/(25 + 30 + 35)
    = 15.17
    Hence, the average age of all the three classes is 15.17 years.
    Answer: 15.17
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    Most Upvoted Answer
    The average age of 25 students in class A is 15 years, that of 30 stud...
    Given Data:
    - Number of students in class A: 25
    - Average age of students in class A: 15 years
    - Number of students in class B: 30
    - Average age of students in class B: 12 years
    - Number of students in class C: 35
    - Average age of students in class C: 18 years

    Approach:
    To find the average age of students from all three classes together, we need to find the total sum of ages across all classes and divide it by the total number of students.

    Let's calculate the total sum of ages for each class first.

    Calculating Total Sum of Ages:
    - Total sum of ages in class A = Number of students in class A * Average age of students in class A = 25 * 15 = 375 years
    - Total sum of ages in class B = Number of students in class B * Average age of students in class B = 30 * 12 = 360 years
    - Total sum of ages in class C = Number of students in class C * Average age of students in class C = 35 * 18 = 630 years

    Calculating Total Number of Students:
    - Total number of students = Number of students in class A + Number of students in class B + Number of students in class C = 25 + 30 + 35 = 90 students

    Calculating Average Age:
    - Average age of students from all three classes = Total sum of ages / Total number of students
    - Average age = (375 + 360 + 630) / 90 = 1365 / 90 = 15.17 (rounded off to two decimal places)

    Conclusion:
    The average age of students from all three classes together is 15.17 years.
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    The average age of 25 students in class A is 15 years, that of 30 students in class B is 12 years and that of 35 students in class C is 18 years. Find the average age of students of all the three classes together. (Round off your answer upto two decimal places.)Correct answer is '15.17'. Can you explain this answer?
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    The average age of 25 students in class A is 15 years, that of 30 students in class B is 12 years and that of 35 students in class C is 18 years. Find the average age of students of all the three classes together. (Round off your answer upto two decimal places.)Correct answer is '15.17'. Can you explain this answer? for CAT 2024 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about The average age of 25 students in class A is 15 years, that of 30 students in class B is 12 years and that of 35 students in class C is 18 years. Find the average age of students of all the three classes together. (Round off your answer upto two decimal places.)Correct answer is '15.17'. Can you explain this answer? covers all topics & solutions for CAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of 25 students in class A is 15 years, that of 30 students in class B is 12 years and that of 35 students in class C is 18 years. Find the average age of students of all the three classes together. (Round off your answer upto two decimal places.)Correct answer is '15.17'. Can you explain this answer?.
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