If the average (arithmetic mean) of x and y is 80, and z – x = 100, what is the average of y and z?	Choose the correct choice from the following answers:	A) 140	B) 100	C) 110	D) 120	E) 130
x+y/2 = 80   =&gt; x+y = 160   x = z - 100...sub this value   z-100+y = 160   =&gt;z+y = 260   =&gt;z+y/2 = 130   Answer : 130
<result>E</result>
If the average (arithmetic mean) of x and y is 80, and z – x = 100, what is the average of y and z?