Which should you use, that or those? The word that can have different functions. That may function as a demonstrative pronoun, referring to something already mentioned. Those is the plural of that.
| Correct: |
The income generated from Fund A is twice that generated from Fund B.
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| Correct: |
The probability of drawing a blue ball from the bag is thrice that of a red ball.
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When you use that to refer to something already mentioned, make sure that the number of the demonstrative pronoun agrees with the number of its antecedent.
| Incorrect: |
Our production costs are double that of our competitors.
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| Correct: |
Our production costs are double those of our competitors.
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| Incorrect: |
If you shop around, you may find banks that offer rates that are twice that of other banks.
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| Correct: |
If you shop around, you may find banks that offer rates that are twice those of other banks.
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