Answer:

Step-by-step explanation:
From the Venn diagram, n(AUB)=31
The given probabilities in the option are calculated below:

The only correct option is the probability of B which is 
Answer:
<h2>D. 3</h2>
Step-by-step explanation:



Mark points in the coordinate system.
Lead a line through these points.
Read x-intercept.
Step-by-step explanation:
Name the total of pens purchased as x and the pencils as y... Make two equations and solve them. I also search for the pencils purchased in addition