The average height of 50 pupils in a class is 150 cm. Five of them whose height is 146 cm, leave the class and five others whose average height is 156 cm, join. The new average height of the pupils of the class (in cm) is __________ .

Related Mcqs:

1. The average height of 35 boys in a class was calculated as 180cm. It has later found that the height of one of the boys in the class was wrongly written as 166 cm whereas his actual height was 106 cm. Find the actual average height of the boys in the class (Round off your answer to two decimal places)?

   A. 179.29 cm
   B. 178.29 cm
   C. 179.38 cm
   D. 178.39 cm

2. A pupil’s marks were wrongly entered as 83 instead of 63. Due to the average marks for the class got increased by half. The number of pupils in the class is___________?

   A. 10
   B. 20
   C. 40
   D. 73

3. The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ration of the number of boys to the number of girls in the class is___________?

   A. 1:2
   B. 2:3
   C. 3:4
   D. 3:5

4. The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam.

   A. 20
   B. 15
   C. 25
   D. 35

5. The ratio of boys and girls in a class was 11:13. 8 girls and 4 boys join the class from this academic year and the ratio becomes 4:5. Find the strength of the class.

   A. 96
   B. 68
   C. 72
   D. 108

6. A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?

   A. Rs.150
   B. Rs.225
   C. Rs.250
   D. None

7. The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

   A. 50
   B. 47.5
   C. 59
   D. 52.5

8. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.

   A. 47.55 kg
   B. 48 kg
   C. 48.55 kg
   D. 49.25 kg

9. The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?

   A. 15 years
   B. 17 years
   C. 18 years
   D. 19 years

10. The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

    A. 55 kg
    B. 62 kg
    C. 56 kg
    D. None