An advertising agency, which reached 25% of its target audience with its old campaign, has devised a

Question:

An advertising agency, which reached 25% of its target audience with its old campaign, has devised a new advertising campaign. In a sample of 1000 people, it finds that 290 people have been reached by the new advertising campaign. What is the probability that at least 290 people
would have been reached by the old campaign? Does the new campaign seem to be more effective?