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Group 1 TNPSC Question Paper - 8th November 2015 - Prelims


31. 

Among the 50 students in a class, what percentage of students like biology and chemistry?

Subjects No. of students
Mathematics 6
Physics 12
Chemistry 15
Biology 8
Computer science 9

Answer : B. 46%

32. 

For any n observations of data, what is the value of (∑x) - nx ?

Answer : D. 0

33. 

Simplify : 0.728x0.728-0.272x0.272
                               0.456

Answer : B. 1

34. 

If x/y = 3/5, then 5x + 2y   is equal to
                         5x - 2y

Answer : B. 5

35. 

A person's present age is two-fifth of the age of his mother. After 8 years, he will be one half of his mother at present?

Answer : B. 40

36. 

Find the value of 1.2x1.2x1.2-0.2x0.2x0.2
                            1.2x1.2+1.2x0.2+0.2x0.2

Answer : B. 1

37. 

A bicycle marked at Rs. 1,500 is sold for Rs. 1,350. What is the percentage of discount?

Answer : D. 10

38. 

Which one of the following is the smallest ratio?
7 : 3, 17 : 25, 7 : 15, 15 : 23

Answer : C. 7:15

39. 

In a mixture of 60 litres, the ratio of milk and water is 2 : 1. If this ratio is to be 1 : 2, then what is the quality of water to be further added?

Answer : D. 60 l

40. 

Two numbers are in the ratio 3 : 5. If 9 be subtracted from each, then they are in the ratio 12 : 23. Find the second number

Answer : D. 55



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