A competition is taking place between two choirs, the Notes and the Classics. There is a large audience for the competition.

• 30% of the audience are Notes supporters.
• 45% of the audience are Classics supporters.
• The rest of the audience are not supporters of either of these choirs.
• No one in the audience supports both of these choirs.

A random sample of 240 people is chosen from the audience. Use a suitable approximation to find the probability that fewer than 50 do not support either of the choirs.