medium · GRE Quant
A bar chart displays market share for three companies: X has 25%, Y has 20%, and Z has 15%. Together, X, Y, and Z account for only 60% of the total market. The chart is titled 'Market Share by Company' with no further note. Which statement is supported by the numerical values?
- Companies other than X, Y, and Z hold a combined market share of 40%, even though the chart does not display them.
- X, Y, and Z together hold the entire market, since their listed percentages already add up to all of the market share shown on the chart.
- No other companies compete in this market.
- Y's market share is greater than X's.
- Z's market share is exactly double Y's.
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