Question

A jar contains "x" black and "y" white balls. What is the probability that a random draw is black?

Answer 1

Total would be "x" plus "y".
Probability of drawing a black ball is x / (x + y)

Answer 2

probability that a random draw is black =
`(x)/(x+y)`.

Explanation:

Given: A jar contains "x" black and "y" white balls.

To find: What is the probability that a random draw is black.

Solution: We have given that black balls = x

white balls = y

total balls = x + y

probability that a random draw is black =
`(Number\ of\ outcome happen)/(Total numer of outcomes)`

probability that a random draw is black =
`(Ball\ drawn\ is\ black)/(Total\ number\ of\ ball)`.

probability that a random draw is black =
`(x)/(x+y)`.

Therefore, probability that a random draw is black =
`(x)/(x+y)`.