Answer:
a. volume= 784 is the answer
Answer:
X has an infinite number of solutions
or
0 = 0
Step-by-step explanation:
<em>Hey there!</em>
Given,
523x = 523x
Simplify
523x = 523x
-523x to both sides
0 = 0
<u>So x has an infinite number of solutions.</u>
<em>Hope this helps :)</em>
Solution :
Let A = Economics, B = Mathematics
n(A) = 311, n(B) = 243, 
a). So, 
= 311 + 243 - 135
= 419
b). n(A only) = 311 - 135
= 176
n(B only) = 243 - 135
= 108
Exactly one of these two courses

= 0.568
c). Neither economics nor mathematics


= 0.162
Answer:
It's 90 because we'll make it equal