Harry has 2 blue pens, 2 black pens and 4 red pens in his box. He picks one pen and records its color, then puts it back in the box and draws another pen. What is the probability of taking out a red pen followed by the blue pen

1/8

Step-by-step explanation:

Given:

=> the total pens: 2+2+4 = 8

The probability of taking out a red pen is: 4/8

Because the is replacement when you put the red back in the box and the sum of pen is unchanged.

So the probability of taking out a blue pen is: 2/8

So the probability of taking out a red pen followed by the blue pen is:

4/8 * 2/8  = 1/8

Hope it will find you well.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.