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Arithmetic Aptitude :: Average

  1. Average age of a group of 30 boys is 16 years. A boy of age 19 leaves the group and a new boy joins the group. If the new average age of the group is 15.8 years, find the age of the new boy.
  2. A.
    12 years
    B.
    13 years
    C.
    14 years
    D.
    15 years

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  3. The average weight of 10 men is decreased by 2 kg when one of them whose weight is 60 kg is replaced by a new man. What is the weight of the new man?
  4. A.
    35 kg
    B.
    40 kg
    C.
    45 kg
    D.
    50 kg

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  5. The average age of 30 boys in a class is 15 years. If we include the age of two teachers the average age increases by 1. Find the sum of ages of the two teachers.
  6. A.
    55 years
    B.
    58 years
    C.
    62 years
    D.
    64 years

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  7. The average age of the committee of 10 members is 40 years. A member of age 52 retires and a new member of age 38 takes his place. What is the average age of the present committee?
  8. A.
    38.6 years
    B.
    33.5 years
    C.
    35.5 years
    D.
    37.5 years

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