Multiple Choice Questions on What is the age of a class teacher I There are 11 students in the class II The average age of the st........... for IBPS RRB - Officers Exam Preparation

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Multiple Choice Questions

What is the age of a class teacher I There are 11 students in the class II The average age of the st...........

Quantitative Aptitude(IBPS RRB PO) Data Sufficiency
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    Direction: In each of the following questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer:

    What is the age of a class teacher?

    I. There are 11 students in the class.

    II. The average age of the students and the teacher is 14 years.

    III. The average age of the teacher and the students is 3 years more than that of the students.

    Both I and III

    Incorrect Answer

    Both I and II

    Incorrect Answer

    II & either I or III

    Incorrect Answer

    All I, II and III

    Correct Answer

    None of these

    Incorrect Answer
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    Explanation:

    From I. There are 11 students in the class.

    From II. The average age of students and class teacher is 14 years.

    From III. The average age of class teacher is 3 years more than that of students.

    Now, combining all there statements, we have Average age of (students + teacher) = 14 × 12 = 168 years

    Average age of 11 students = 14 – 3 = 11 years

    Total age of 11 students = 11 × 11 = 121 years Teacher’s age = 168 – 121 = 47 years.

    This requires all statements to complete the calculations.

    By: Munesh Kumari
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