28. A continuously random variable is uniformly distributed between 10 and 50. T

Question

28. A continuously random variable is uniformly distributed between 10 and 50. The probability that the value of random variable equals 30 should be

0.25

0.50

0.75

0

29. A continuously random variable is uniformly distributed between 10 and 50. The probability P (20 < x < 40) should be

A. 0.25

B. 0.50

C. 0.75

D. 0

30.

The long distance calls made by the employees of a company are normally distributed with a mean of 6 minutes and a standard deviation of 2 minutes. The probability that a call lasts exactly 6 minutes should be

0.5000

0.4281

0.2742

0

31.

The long distance calls made by the employees of a company are normally distributed with a mean of 6 minutes and a standard deviation of 2 minutes. The probability that a call lasts between 6 and 9 minutes should be

0.9332

0.4821

0.4332

0.0668

0.25

0.50

0.75

0

Explanation / Answer

28) Option-D) 0

29) Option-B) 0.5

30) Option-D) 0   

31) Option-C) 0.4332

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