Suppose that one voter in the 2010 UK General Election was selected

at random. The probability that the person voted for the
Conservative Party was 0.36, the probability that the person voted for
the Labour Party was 0.29, and the probability that the person voted
for the Liberal Democrat Party was 0.23. What is the probability that
the person voted for one of the parties that subsequently formed the
coalition government, namely the Conservative Party or the Liberal
Democrat Party?

1 answer

Note that your 3 probabilities do not add up to 1, thus other parties must also have received votes

Your want the prob(CP OR L)
= .36+.23 = .59