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In a discrete random variable x follows uniform distribution and assumes only the values 8, 9, 11, 15, 18, 20. Then P(x < 15) is
  • a)
    1/2
  • b)
    2/3
  • c)
    1
  • d)
    non
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In a discrete random variable x follows uniform distribution and assum...
Uniform Distribution:
In statistics, a uniform distribution is a probability distribution where all outcomes are equally likely. In other words, each value in the distribution has the same probability of occurring.

Given Information:
In this question, we are given that the random variable x follows a uniform distribution and assumes the values 8, 9, 11, 15, 18, and 20.

Determining the Probability:
We need to find the probability of x being greater than 15, i.e., P(x > 15).

To find this probability, we need to determine the number of favorable outcomes (values of x) and the total number of outcomes.

Favorable Outcomes:
From the given information, we can see that the values of x greater than 15 are 18 and 20. Therefore, there are 2 favorable outcomes.

Total Outcomes:
The total number of outcomes is the number of values x can assume, which is 6 in this case.

Calculating the Probability:
To calculate the probability, we divide the number of favorable outcomes by the total number of outcomes.

P(x > 15) = Number of Favorable Outcomes / Total Number of Outcomes
= 2 / 6
= 1/3

However, the question asks for P(x ≤ 15), not P(x > 15). Since the values of x are discrete and uniformly distributed, the probability of x being equal to 15 is 0.

Therefore, P(x 15) = 0.

The correct answer is option 'D' (non).
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In a discrete random variable x follows uniform distribution and assumes only the values 8, 9, 11, 15, 18, 20. Then P(x < 15) isa)1/2b)2/3c)1d)nonCorrect answer is option 'A'. Can you explain this answer?
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