Answer :

(a) Since, the sum of angles of a triangle as 180° therefore, it is certain to happen.

(b) The result is unpredictable therefore, it may or may not happen

(c) Since, the sun always sets in the evening therefore, it is certain to happen.

(d) 7 is not an outcome when a dice is thrown therefore it is impossible to happen.

(e) Sun always rises from the east, therefore it is impossible to happen.

(f) The result is unpredictable therefore, it may or may not happen

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