answer:
p = 0
step-by-step explanation:
6 (7-2p) = 12p + 42
42 - 12p = 12p + 42
+12p +12p
_______________
42 = 24p + 42
-42 -42
_____________
0 = 24p
_ ___
24 24
0 = p
<em>hope this helps! ❤ from peachimin (aka kayla)</em>
Looks like this
Everything in one picture
Solution :
It is given that :
Number of students in a random sample majoring in communication or psychology at an university = 250
Total number of students majoring in psychology = 100
Number of students majoring in psychology those who are happy = 80
So number of students majoring in psychology those who are not happy = 20
Total number of students majoring in communication = 250 - 100 = 150
Number of students majoring in communication those who are happy = 115
So number of students majoring in psychology those who are not happy = 35
a). Probability of the students happy with their major choices are

= 0.78
b). Psychology major 
= 0.4
c). Probability of the students who are happy with the communication as the choice of major =
= 0.46
d). Students unhappy with their choice of major given that the student is psychology major =
= 0.018
4 x 7= 28
BTW no calculator. Did it in my head. Hope this helps!