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RRB Model Question Paper for Station Master AVERAGE Problems And Answers





1. The average age of six members is 15 years. A Person with 20 years age left the group. Then what is the average age of remaining persons?
A. 15 B. 14
C. 13 D. 16
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2. The average weight of A, B, C is 45 kg. If the average weight of A and B is 40 kg and that of B and C is 43 kg, then the weight of B is:
A. 31 kg B. 18 kg
C. 21 kg D. 26 kg
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3. The average of 6 numbers is 30. If the average of first four is 25 and that of last three is 35, the fourth number is:
A. 25 B. 30
C. 35 D. 40
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4. Out of three numbers, the first is twice the second and is half of the third. If the average of three numbers is 56, the difference of first and third numbers is:
A. 12 B. 20
C. 24 D. 48
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5. The mean temperature of Monday to Wednesday was 37° C and that of Tuesday to Thursday was 34° C. If the temperature on Thursday was 4/5 of that of Monday, then what was the temperature on Thursday?
A. 36.5° C B. 36° C
C. 35° C D. 37° C
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6. The average of marks in Mathematics for five students was found to be 50. Later on, it was discovered that in case of one student, the marks 48 were misread as 84. The correct average is:
A. 40.2 B. 40.8
C. 42.8 D. 48.2
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7. The average weight of 8 men is increased by 1.5 kg when one of the men who weights 65 kg is replaces by a new man. The weight of the new man is:
A. 70 kg B. 74 kg
C. 76 kg D. 77 kg
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8. The average of marks of 28 students in Mathematics was 50; 8 students left the school and then the average increased by 5. What is the average of marks obtained by the students who left the school?
A. 37.5 B. 42.5
C. 45 D. 50.5
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9. When the average age of a husband and wife and their son was 42 years, the son got married and a child was born just one year after their marriage. When child turned to be 5 years, then the average of the family become 36 years. What was the age of daughter-in-law at the time of marriage?
A. 26 B. 25
C. 27 D. 28
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