Option 4 : -1

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**Formula used:** a̅ . bdc̅ = -a + [bdc – bd]/900, where number of 9 are as per digits after decimal with bar, and number of 0 is as per digits after decimal without bar

**Calculation:** 2̅ .33̅ + 2/3

= -2 + [33-3]/90 + 2/3 = -2 + 30/90 + 2/3 = -2 + 1/3 + 2/3 = -2 + 1 = -1

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