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A light was seen at intervals of 13 s...

A light was seen at intervals of 13 seconds. It was seen for the first time at 1 hr. 54 min. 50 secs. a.m. and the last time at 3 hrs. 17 min. 49 secs. a.m. How many times was the light seen? (a) 360       (b) 375       (c) 378      (d) 384

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