Answer: 6.1.9.!!!!!
Step-by-step explanation://Give thanks(and or Brainliest) if helpful (≧▽≦)//
And thxs 4 these post bro!
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 = 
Given two vectors

they are parallel if they are a multiple of each other:

You can easily test this by checking if

they are orthogonal if their dot product is null:

For example, in the first case, we have

So, they aren't parallel. Similarly, you have

So, they aren't orthogonal.
In the second case, we have

So, they aren't parallel, and

So, they are orthogonal.
Finally, we have

So, they are parallel (and thus can't be orthogonal)
Answer:
POINT B LIES ON FOUR FACES OF THE PYRAMID
Step-by-step explanation:
A PYRAMID HAS FIVE FACES IN THAT FOUR ARE TRIANGLE ONE IS SQUARE AS POINT B LIES AT THE TOP OF FOUR TRIANGLES WE CONSIDER AS IT LIES ON FOUR FACES OF A PYRAMID
I'VE TRYED MY LEVEL TO HELP YOU ONLOCK A STAR AND ADD ME AS BRAINLIEST
Answer:
The answer is D
Hopes this helps
Step-by-step explanation: