Consider the type of clothes dryer (gas or electric) purchased by each of five different customers at a certain store. (a) If the probability that at most one of these purchases an electric dryer is 0.422, what is the probability that at least two purchase an electric dryer?

0.578

Step-by-step explanation:

Given that

The probability that at most one of these purchases an electric dryer  = 0.422

Since the most one of these purchase probability is given i.e 0.422

So, the  probability of at least two purchase an electric dryer is

= 1 - most one of these purchase probability

= 1 - 0.422

= 0.578

Basically, we subtracted the given probability with the one

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

the answer is b