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Study the given table and answer the question that follows. The table depicts the number of different items A and B sold in the year 2021 and 2022.
| Years | Number of item A | Number of item B |
|---|---|---|
| 2021 | 210 | 180 |
| 2022 | 240 | 190 |
40
50
60
30
50
Given: For the year 2022, Number of item A = 240 and Number of item B = 190.
For the year 2022, Number of item A = 240 and Number of item B = 190.
Difference=тИгA2022тАЛтИТB2022тАЛтИг
Focus only on the 2022 row and calculate the subtraction 240тИТ190 mentally without looking at 2021 data.
Students often mistakenly subtract values from different years (e.g., 240тИТ180 or 210тИТ190) instead of strictly sticking to the year 2022 column.
Identify values for 2022
Extract the specific values for items A and B from the table for the year 2022.
Item┬аA2022тАЛ=240,Item┬аB2022тАЛ=190
Calculate the absolute difference
Subtract the quantity of item B from item A as requested by the problem statement.
Difference=240тИТ190=50
B is correct because the difference between 240 and 190 is 50.
In competitive exams, always re-verify the year mentioned in the question to avoid 'distractor' values from other rows.