The urn contains 3 white and 4 black balls. One ball is drawn from it at random.

The urn contains 3 white and 4 black balls. One ball is drawn from it at random. Find the probability that this ball will be white.

A – the white ball is taken out.

The probability of event A is the ratio of the number of white balls to the total number of balls in the urn.

Let’s find how many balls are in the urn. To do this, add the number of white and black balls:

3 + 4 = 7 (balls) – in total in the urn.

Let’s find the probability:

P (A) = 3/7 = 0.429.

Let’s express the probability as a percentage:

0.429 * 100% = 42.9%.

Answer: The probability of hitting the white ball is 0.429 (42.9%).