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:
61
Step-by-step explanation:
180 - 58 = 122
122÷2 = 61 because it's a and isoslecs triangle
Answer: 5/8
Step-by-step explanation:
Number of green jelly beans = 3
Number of red jelly beans = 5
Total number of jelly beans = 3 + 5 = 8
The probability of selecting a red jelly bean would be:
= Number of red jelly beans /:Total number of jelly beans
= 5/8
For example: 35 divided by 5 is 7. So to check with multiplication, just think 7 times 5 is what? 35. This is the same formula for everything.
Hope this helps!!
The first step is to move the terms of the expression around so that the like terms are next to each other.
6a - 4a + 3xy - 7xy Now, combine like terms (6a - 4a) and (3xy - 7xy)
2a - 4xy
