Direction : Study the following table and answer the questions that follow : Number of sanitizers sold by companies A, B, C and D in 2021 and 2022Year →
Company ↓Number of Sanitizers Sold 2021 2022 A 230 240 B 350 380 C 310 390 D 270 310
By how many sanitizers does the total number sold by all four companies in 2022 exceed the total number of sanitizers sold in 2021 ?
160
The excess is the 2022 column total minus the 2021 column total; it can also be found by adding each company’s year-on-year change.
Step 1 — 2022 total = \(240 + 380 + 390 + 310 = 1320\).
Step 2 — 2021 total = \(230 + 350 + 310 + 270 = 1160\).
Step 3 — Excess = \(1320 - 1160 = 160\) (check by company changes: \(10 + 30 + 80 + 40 = 160\)).
150, 140 and 170 differ from the exact total by 10 or 20, which would only happen if one of the eight values were misread, so they are wrong.
160 option is correct.
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