ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

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

    Question

    The average age of (x + 3) students is 20 years. When

    their teacher aged 35 years joins them, the average increases by 1 year. Find x% of 400.
    A 44 Correct Answer Incorrect Answer
    B 100 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 66 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Total age of students = 20(x + 3) years According to question, [20(x + 3) + 35] = (20 + 1)(x + 3 + 1) 20x + 60 + 35 = 21x + 84 20x + 95 = 21x + 84 21x тАУ 20x = 95 тАУ 84 x = 11 So, 11% of 400 = 44

    Practice Next
    More Age Questions

    Relevant for Exams:

    ask-question