Can someone help me with all off theses plsss
2 answers:
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Answer:
Step-by-step explanation:
Probability refers to chance of happening of some event.
Conditional probability is the probability of an event A, given that another event B has already occurred.
denote the two boxes.
In box :
No. of black balls = 1
No. of white balls = 1
In box :
No. of black balls = 2
No. of white balls = 1
Let B, W denote black and white marble.
So, probability that either of the boxes is chosen is
Probability that a black ball is chosen from box =
Probability that a black ball is chosen from box
To find:probability that the marble is black
Solution:
Probability that the marble is black =
Answer:
2½ h
Step-by-step explanation:
Assume the graph is like the one below.
The graph shows how Erin's distance varies with time.
To find out how long it takes Erin to cover 25 mi, find 25 mi on the vertical axis.
From there, draw a horizontal line until it hits the graph.
Then drop a vertical line to the horizontal axis.
It hits half-way between 2 and 3.
It takes Erin 2½ h to run 25 mi.
Answer: -3
Step-by-step explanation:
-4 +
can be written as
x
which is the same as 2
Also , can be written as
x
, which is the same as 5
Substituting into the main question , we have
-4 (2 ) + 5
= -8 + 5
= -3