Someone please tell me how to solve this question.

Q. Among 900 taxpayers with income below $100,000, 35 were audited by the IRS. The probability that a randomly chosen individual with an income below $100,000 was audited is ???

Someone please tell me how to solve this question.

Q. Among 900 taxpayers with income below $100,000, 35 were audited by the IRS. The probability that a randomly chosen individual with an income below $100,000 was audited is ???

35 / 900 = 3.89%

Thanks!