Posted by **Roshelle** on Saturday, March 10, 2012 at 4:30pm.

Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (because both x and y can range from 0 to a). It can be shown that the density curve of w is as pictured (this curve is called a triangular distribution, for obvious reasons!)

Answer the following questions assuming a = 50, b = 0.02.

What is the probability that w is less than 50? Less than 25? Greater than 75?What is the probability that w is between 25 and 75?

- Statistics -
**Anonymous**, Sunday, June 9, 2013 at 4:43pm
No idea help

- Statistics -
**mike**, Sunday, November 2, 2014 at 6:21pm
0.06

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