Data InsightsGraphs & Tables

Free GMAT Graphs & Tables Practice Question

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Five rinks in rows; columns: weekly skater-hours (thousands), ice sheets, session price (dollars), staff. Sortable.
Rink	Weekly skater-hours (000s)	Ice sheets	Session price ($)	Staff
Arctic	48	4	16	30
Blizzard	72	9	11	55
Crystal	30	2	22	24
Drift	54	6	14	60
Frost	40	5	19	28

The table shows five ice-skating rinks: weekly skater-hours in thousands, the number of ice sheets, the public session price, and the number of staff. The table can be sorted by any column. For each statement, select Yes if it must be true based only on the data shown; otherwise select No.

(1) The rink with the most weekly skater-hours also has the most skater-hours per ice sheet: . (2) The average session price weighted by weekly skater-hours is below the simple average of the five rinks' session prices: . (3) The rink with the most weekly skater-hours also has the most staff: .

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Answer & Explanation

Correct answer

1: No · 2: Yes · 3: No

One statement builds a per-sheet ratio, one weights a price by skating volume, and one tests a co-occurrence no row supports.

Skater-hours per sheet is weekly skater-hours divided by ice sheets: Arctic 12, Blizzard 8, Crystal 15, Drift 9, Frost 8.

Statement 1 - No. The rink with the most skater-hours is Blizzard at 72,000, but across 9 sheets that is only 8 per sheet, tied for the lowest; the densest is Crystal at 15 with just 2 sheets. So the busiest rink is not the most productive per sheet, and the statement is false. The trap is to assume the busiest rink leads on every measure.

Statement 2 - Yes. The simple average of the five session prices is (16 + 11 + 22 + 14 + 19) / 5 = $16.40. Weighting each price by the rink's skater-hours gives (768 + 792 + 660 + 756 + 760) / 244 = 3,736 / 244 = $15.31. The volume-weighted figure is lower, so the statement is true. The reason is that the busiest rink, Blizzard with 72,000 skater-hours, charges the lowest price of $11, so it carries the most weight and pulls the average down. The trap is to average the five prices and stop.

Statement 3 - No. The most skater-hours is Blizzard at 72,000, but the most staff is Drift at 60; Blizzard has 55. The two leaders are different rinks, so the statement is false. The trap is to assume the busiest rink must employ the most people.

The lesson: a per-sheet figure is built not read, an average weighted by volume can fall below the simple mean, and one rink need not lead on two measures at once. Correct answers: No / Yes / No.