📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    âš¡ Month End Offer - Flat 52% Off On All Courses! Enroll Now âš¡
    00:00:00 AM Left

    Question

    The mean age of 30 students was calculated as 15 years.

    However, it was later discovered that one student's age was mistakenly entered as 15 years instead of 9 years. What is the accurate average age of the students?
    A 14.2 years Correct Answer Incorrect Answer
    B 16.4 years Correct Answer Incorrect Answer
    C 15.6 years Correct Answer Incorrect Answer
    D 14.8 years Correct Answer Incorrect Answer

    Solution

    Sum of ages of 30 students = 30 x 15 = 450 years Actual sum of ages of 30 students = (450 - 15 + 9) = 444 years Actual average of 30 students = (444/30) = 14.8 years

    Practice Next
    More Algebra Questions

    Relevant for Exams:

    ask-question