Question

A bag contains 24 discs.

8 are red and 16 are blue.


One disc is taken out at random and replaced by two of the other colour.

Another disc is then taken out at random and replaced by two of the other colour.

Another disc is then taken out at random,

Work out the probability that all three discs taken out are red.

Fractions can be written in the form a/b

Answer 1

Answer::8/24 are RedPick and return 2So it will be 7/25Again pick and return 2Then it is 6/26Now multiply the results8/24 …

Explanation: