The area under the part of a normal curve that lies within two standard deviation of the mean is ________.

A vintage car breaks down an average of four times per month. Find the probability that during the next month this vintage card will have at most two breakdowns.

What is the probability that the total of two dice will be greater than 9, given that the first die is a 5?

DOLE found that 83% of Filipinos think that having a college education is important to succeed in life. If a random sample of 7 Filipinos is selected, find the probability that at most two people will agree with that statement.

The experiment consists of counting the number of events that will occur during a specific interval of time or in a specific distance, area, or volume.

Five balls numbered 1, 2, 3, 4, and 5 are placed in a box. One is selected, its number is noted and then it is replaced. If this experiment is repeated many times, find the variance of the numbers on the balls.

These are the most important characteristics of any probability distribution.

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