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Officer-2019 [MCQ]

41. If A = {1, 2, 3 4,5}, then the number of proper subsets of A is—

[Officer-2019 [MCQ] : 2019]

1. 120

2. 30

3. 31

4. 32

Answer

42. Two numbers are in the ratio 2 :5. If 16 is added to both the numbers, their ratio becomes 1:2. The numbers are—

[Officer-2019 [MCQ] : 2019]

1. 16.40

2. 20,50

3. 28.70

4. 32 80

Answer

43. If Y/x = 1/3 and x + 2y = 10 then x is__

[Officer-2019 [MCQ] : 2019]

1. 2

2. 3

3. 4

4. 6

Answer

44. How many real roots does the polynomial 2x^3 + 8x – 7 have?

[Officer-2019 [MCQ] : 2019]

1. None

2. One

3. Two

4. Three

Answer

45. If xy = 2 and xy^2 = 8, what is the value of x?

[Officer-2019 [MCQ] : 2019]

1. 4

2. 2

3. ½

4. 8

Answer