Ben needs to read 450 pages of his book for school. If he has five days to finish, how many pages should he read each day?
2 answers:
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Answer:
The mean of the distribution is 0.25.
The variance of the distribution is of 0.6875.
Step-by-step explanation:
Probability density function:
For it to be a probability function, the sum of the probabilities must be 1. The probabilities are 3c, 3c and 6c, so:
So the probability distribution is:
Mean:
Sum of each outcome multiplied by its probability. So
The mean of the distribution is 0.25.
Variance:
Sum of the difference squared between each value and the mean, multiplied by its probability. So
The variance of the distribution is of 0.6875.