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  • Question
  • The average age of 6 members of a family is 20 years. If the age of the servant is included, then the average age increase by 25%. What is the age (in years) of the servant?


  • Options
  • A. 30
  • B. 35
  • C. 50
  • D. 55

  • Correct Answer
  • 55 

    Explanation

    Ratio of milk and water = 2 : 1
    Quantity of milk = 60 X 2/3 = 40 litre
    Quantity of water = 20 litre
    To make ratio, 1: 2, we have to double the water that of milk
    So, water should be 80 litre.
    That means 80 ? 20 = 60 litre water to be added.

  • Tags: Bank Exams

    More questions

    • 1. What is the average of four tenths and five thousandths

    • Options
    • A. 25002
    • B. 2502
    • C. 0.2025
    • D. none
    • Discuss
    • 2. Which number will come in place of question mark 7, 16, 36, 78, 144, ?

    • Options
    • A. 168
    • B. 196
    • C. 222
    • D. 256
    • Discuss
    • 3. Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)

    • Options
    • A. 61, 58 and 55
    • B. 54, 51, and 48
    • C. 55, 58, and 61
    • D. 48, 51 and 54
    • Discuss
    • 4. In the given figure, PQRS is a square inscribed in a circle of radius 4 cm. PQ is produced till point Y. From Y a tangent is drawn to the circle at point R. What is the length (in cm) of SY ?

    • Options
    • A. 4√10
    • B. 2√10
    • C. 6√10
    • D. 3√5
    • Discuss
    • 5. If V = 12R / (r + R) , then R =

    • Options
    • A. Vr / (12 - V)
    • B. Vr + (V /12 )
    • C. V
    • D. V / (r - 12 )
    • Discuss
    • 6. In a class of 60 students there are 20 girls who scored an average of 40 marks in the test, what is the average marks of the boys if the class average is 60 marks?

    • Options
    • A. 60
    • B. 70
    • C. 50
    • D. D)
    • Discuss
    • 7. Which of the fractions given below, when added to 5/8, gives 1?

    • Options
    • A. 6/16
    • B. 5/2
    • C. 6/24
    • D. 6/3
    • Discuss
    • 8. LCM of 80, 85, 90

    • Options
    • A. 11440
    • B. 11998
    • C. 12240
    • D. 12880
    • Discuss
    • 9. In a triangle, the distance of the centroid from the three vertices is 4cm, 6cm and 8cm respectively. Then the length of the smallest median is:

    • Options
    • A. 8
    • B. 7
    • C. 6
    • D. 5
    • Discuss
    • 10. In a mixture of 25 litres, the ratio of milk to water is 4:1. Another 3 litres of water is added to the mixture. The ratio of milk to water in the new mixture is

    • Options
    • A. 5:1
    • B. 5:2
    • C. 5:3
    • D. 5:4
    • Discuss


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