Y=1x-10 (sorry I could be wrong)
Just divide as you normally would but 1 or 2 numbers at a time
Answer:
B
Step-by-step explanation:
It can be crossed if sides are same in multiply, as shown in the answer
The questions is asking which one and i say is graph B
The probability of picking a black ball first is

, because there are 4 black balls and 1 white ball which is 5 balls in total. After picking the first ball, 4 balls remain - 3 black and 1 white, so the probability of picking a white ball is

.
So, the probability of picking a black ball first followed by a white ball is