A movie buff owns movies on DVD and on Blu-ray in a ratio of 9:2. If she buys 2 more Blu-ray movies, that ratio would change to 17:4. If she owns movies on no other medium, what was the original number of movies in her library before the extra purchase?	Choose the correct choice:
A) 22  B) 28  C) 77  D) 99  E) 187
if u can just keep an eye on the options   99 is the only multiple of 9 in options given .. SO you can mark it wid in seconds.   Now coming to the process m(D) = 9x and b(D) = 2x   now from the next line the new eqn becomes 9x/ (2x + 2) = 17/4   Solving it 36x = 34x + 34x =17   which means m (d) = 153 and b(d) = 34   SO total initially is m(d) + b(d) = 187   187
<result>E</result>
A movie buff owns movies on DVD and on Blu-ray in a ratio of 9:2. If she buys 2 more Blu-ray movies, that ratio would change to 17:4. If she owns movies on no other medium, what was the original number of movies in her library before the extra purchase?