In a triangle ABC, if taken in order, consider the following statements :

1. AB̅ + BC̅ + CA̅ = 0̅

2. AB̅ + BC̅ – CA̅ = 0̅

3. AB̅ – BC̅ + CA̅ = 0̅

4. BĀ – BC̅ + CĀ = 0̅
How many of the above statements are correct ?

Mathematics 2018 NDA Mathematics 2018 NDA 2018

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