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BKB Senior Officer-2012

16. A researcher computed the mean, the median and the standard deviation for a set of performance scores. If 5 were to be added to each score,which of these three statistics would change?

[BKB Senior Officer-2012 : 2012]

1. The mean only

2. The median only

3. The standard deviation only

4. The mean and the median

Answer

17. What is the area of an equilateral triangle whose sides are 10?

[BKB Senior Officer-2012 : 2012]

1. 30

2. 25√3

3. 50

4. 50√3

Answer

18. If the angles of a five-sided polygon are in the ratio of 2 : 3 : 3 : 5 : 5, what is the measure of the smallest angle?

[BKB Senior Officer-2012 : 2012]

1. 20

2. 40

3. 60

4. 80

Answer

19. If A is the area and C the circumference of a circle, which of the following is an expression for A in terms of C?

[BKB Senior Officer-2012 : 2012]

1. c²/4π

2. c²/4π²

3. 2c

4. 2c²√π

Answer

20. Which of the following is the value of √(0.000064) 1/3?

[BKB Senior Officer-2012 : 2012]

1. 0.004

2. 0.008

3. 0.02

4. 0.2

Answer