The lights and breaks of 30 bicycles were tested. 27 bicycles passed the lights and 21 passed the brakes test. The light and breaks both failed on one bicycle. How many bicycles passed both tests?
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Answer:
The lights and breaks of 30 bicycles were tested. 27 bicycles passed the lights and 21 passed the brakes test. The light and breaks both failed on one bicycle. How many bicycles passed both tests 19.
