A Space Ship Travelling at 55% the Speed of Light

A space ship travelling at 55% the speed of light relative to a stationary observer shoots a probe to a receiving ship moving at 65% the speed of light relative to the observer in the same direction.The speed of the probe relative to the first ship is 80% the speed of light.How fast does the receiving ship perceive the speed of the probe to be?

A) 0.11 c
B) 0.23 c
C) 0.54 c
D) 0.74 c
E) 0.89 c

Correct Answer:

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