The required probability is 
<u>Solution:</u>
Given, a shipment of 11 printers contains 2 that are defective.
We have to find the probability that a sample of size 2, drawn from the 11, will not contain a defective printer.
Now, we know that, 
Probability for first draw to be non-defective 
(total printers = 11; total defective printers = 2)
Probability for second draw to be non defective 
(printers after first slot = 10; total defective printers = 2)
Then, total probability 
Y=5
Step By Step:
180-75-75
30
4y+10=30
4y=20
y=5
Since this is an isosceles, you know that angle B is congruent to angle C (they’re both 75°).
It looks like the first 3 are because they all are blank x2.5 but the last one would be 8x2.5=20..
Answer:
I answered 3 (your recent question)
The answer to 4 is C
Step-by-step explanation:
MRQL is the plane on the right hand side.
Lines parallel to that are: JK, NP, JN, and KP.
Thus the correct answer is C.