Aptitude - Arithmetical Ability

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43.

In an examination, a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination??                          
A. 8 B. 10
C. 11 D. 12



44.

The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother??                          
A. 40 years B. 42 years
C. 48 years D. 50 years



45.

Kamal obtained 76, 65, 82, 67 and 85 marks(out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks??                          
A. 65 B. 69
C. 72 D. 75




46.

The avearge age of 36 students in a group is 14 years. when teacher's age is included to it, the average increases by one.What is the teacher's age in years??                          
A. 31 B. 36
C. 51 D. None of these



47.

What is the average age of children in the class?(I). The age of the teacher is as many years as the number of children.(II). Average age is increased by 1 year if the teacher's age is also included.?                          
A. I alone sufficient while II alone not sufficient to answer B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer D. Both I and II are not sufficient to answer



48.

The avearage age of boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is?                          
A. 15 years B. 15.5 years
C. 16 years D. Cannot be computed



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