Mr. McElroy enjoys listening to his MP3 player, which has 2,000 songs in five different genres of music. He took a sample of the number of each type of song it played on two different one-hour sessions when it was set to play a random mix. The results are displayed in the table below. What is a good prediction for the number of rock songs Mr. McElroy has on his MP3 player?Listening Samples from Mr. McElroy’s MP3 PlayerSample 1Sample 2Country5Country3Pop4Pop3Classical3Classical5Jazz2Jazz4Rock6Rock5
The two samples contain 40 songs total, and 11 of them are rock songs (6 + 5). Rock songs make up 11/40 of the sample, so estimate 11/40 × 2,000 = 550 rock songs. The good prediction is 550, choice B.
AI-written and checked against the verified answer.