Question:

In 2001 the stock market took some big swings up and down. One thousand investors were asked how often they tracked their investments. The table below shows their responses. What is the probability that an investor tracks the portfolio monthly?

How often tracked? Response
Daily 235
Weekly 278
Monthly 292
Few times a year 136
Do not track 59

My answer:
235+278+292+136+59 = 1000
P(monthly) = 292/1000 = .292

Yes.