Answer:
A. 0.6
B. 0.3
Step-by-step explanation:
For part A we use the the general probability addition rule for the union of two events that states
P(A∪B) = P(A) + P(B) − P(A∩B)
Making P(A∩B) the subject of the equation above
P(A∩B) = P(A) + P(B) − P(A∪B)
P(A∩B) = 0.8 + 0.7 - 0.9
P(A∩B) = 0.6
B.
The description in terms of A and B is:
P(A but not B) + P(B but not A) = P(A∩B') + P(B∩A')
where A' is compliment of set A and B' is compliment of set B
The above description means either it exceeds in July or in January (exactly in one of the two months)
P(A∩B') = 0.8 − 0.6
P(B∩A') = 0.7 − 0.6
P(A∩B') + P(B∩A') = 0.3
it might be claudia but i need more information im not sure take this with a grain of salt!!
Y= x-3 2y-2x=-6
1) add the 2x to both sides// 2y=2x-6
2) divide the 2 on both sides// y=x-3