Aptitude - Arithmetical Ability

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49.

The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers??                          
A. 6.5 B. 4
C. 3 D. 3.5



50.

The average temperature on Wednesday, Thursday and Friday was 250. The average temperature on Thursday, Friday and Saturday was 240. If the temperature on Saturday was 270, what was the temperature on Wednesday??                          
A. 240 B. 210
C. 270 D. 300



51.

. The average age of a group of 12 students is 20years. If 4 more students join the group, the average age increases by 1 year. The average age of the new students is?                          
A. 24 B. 26
C. 23 D. 22




52.

When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students??                          
A. 57 kgs B. 56.8 kgs
C. 58.2 kgs D. 52.2 kgs



53.

The average of 5 quantities is 10 and the average of 3 of them is 9. What is the average of the remaining 2??                          
A. 11 B. 12
C. 11.5 D. 12.5



54.

. The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member??                          
A. 13.5 B. 14
C. 15 D. 12.5



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