Answer:
7 Boxes
Step-by-step explanation:
Dozen=12, 84/12=7
Answer:
0.13
Step-by-step explanation:
First let's find the probability of finding the first species or the second species:
P(A or B) = P(A) + P(B) - P(A and B)
P(A or B) = 0.61 + 0.08 - 0.28
P(A or B) = 0.41
Then, to find the probability of finding one or another but not both, we just need the symmetric difference of the events, that is: P(A or B) - P(A and B):
P(A or B) - P(A and B) = 0.41 - 0.28 = 0.13
11 - 5n = 4n + 20
-5n - 4n = 20 - 11
-9n = 9
n = -1
answer
the number is - 1