Question

Choose the correct alternative:

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. The probability that the second ball drawn is red will be

Options

• `5/12`

• `1/2`

• `7/12`

• `1/4`

Answer 1

`1/2`