Multiple choice

Mark organised a group chat for a project, where he received a total of 900 messages from his colleagues Alice, Bob, Carol, and David. Alice and Bob respectively sent 28% and 18% of these messages, while Carol sent half the number of messages as David. Additionally, Mark realised that out of Alice's, Bob's, Carol's, and David's messages, 25%, 50%, 50%, and 25%, respectively, were funny GIFs. What percentage of the funny GIFs received by Mark were not sent by Carol?

  1. 35.78%

  2. 56.67%

  3. 67.89%

  4. 73.53%

  5. 78.65%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total messages = 900. Alice = 252 (28%), Bob = 162 (18%). Remaining = 486. Carol = x, David = 2x. 3x = 486, x = 162. Carol = 162, David = 324. GIFs: Alice = 252*0.25 = 63. Bob = 162*0.5 = 81. Carol = 162*0.5 = 81. David = 324*0.25 = 81. Total GIFs = 63+81+81+81 = 306. GIFs not by Carol = 306 - 81 = 225. Percentage = (225 / 306) * 100 = 73.53%.

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