The time in hours required to repair a machine is an exponential distributed random variable with the average repair time of 2 hours, what is the probability that the repair time takes between 2 to 4 hours

0.4968 = 49.68% probability that the repair time takes between 2 to 4 hours

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

In which is the decay parameter.

The probability that x is lower or equal to a is given by:

Which has the following solution:

The probability of finding a value higher than x is:

Average repair time of 2 hours

This means that

What is the probability that the repair time takes between 2 to 4 hours

More than 2:

Less than 4:

Between two and four:

0.4968 = 49.68% probability that the repair time takes between 2 to 4 hours

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11