For the first event
P=3/(5+3)=3/8=0.375
Total became 2 red and 5 blue .... 7 total
For the second event
P=2/(5+2)=2/7= 0.2857
Step-by-step explanation:
the answer is
a= 2
b=3
c= 8
Let's check the dot product .
v.w = 5(4)-2(10) = 20 -20 =0
So the dot product is not 20 . And since the dot product is zero, so they are perpendicular.
And the y component of w is 10.
So correct options are first and third .
Another way to solve this is to use the Midpoint Formula. The midpoint of a segment joining points

and

is

So the midpoint of your segment is

Perhaps it helps to see that the x-coordinate of the midpoint is just the average of the x-coordinates of the points. Ditto for the y-coordinate of the midpoint; just average the y's.