**Answer:**

The probability of founding exactly one defective item in the sample is P=0.275.

The mean and variance of defective components in the sample are:

**Step-by-step explanation:**

In the case we have a lot with 3 defectives components, the proportion of defectives is:

a) The number of defectives components in the 5-components sample will follow a binomial distribution B(5,0.075).

The probability of having one defective in the sample is:

b) The mean and variance of defective components in the sample is:

The Chebyschev's inequality established:

3x-15/2=4x

3x-4x=15/2

-1x= 15/2

x= -15/2

**Answer:**

434

**Step-by-step explanation:**

Hello!

Angle POQ and angle MON are vertical which means they are congruent

x - 28 = 149

Add 28 to both sides

x = 177

Angle NOQ and angle NOM are supplementary meaning they add to 180

NOQ + NOM = 180

Put in the known angle

NOQ + 149 = 180

Subtract 149 from both sides

NOQ = 31

The answers are x = 177 and angle NOQ = 31

Hope this helps!

**Answer:**

3

**Step-by-step explanation:**