Answer:
0.50
Step-by-step explanation:
Let A represent the probability that it will be cloudy
Let B represent the probability that it will be rainy
P(A) = 0.40
P(B) = 0.30
P(A and B) = 0.20
For non mutually exclusive events the probability of event A or B is
P(A or B) = P(A) + P(B) - P(A and B)
= 0.40 + 0.30 - 0.20
= 0.50
There is a 50% probability that the picnic will be postponed. Therefore the probability that the picnic will not be postponed is equals 1 - P(A and B)
= 1 - 0.50
= 0.50 or 50%
10.3=0.6y
30=0.6y
y=30/0.6
y=50
Answer:
There are 45 dogs, 27 cats
Step-by-step explanation:
Write and solve an equation of ratios. The "cat ratio" is 3/27 and the "dog ratio" is 5/d:
Then
3 5
------ = -----
27 d
Through cross-multiplication, we get 3d = 135, or d = 45
There are 45 dogs, 27 cats. Notice that 27/45 = 3/5, as expected.