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October 21, 2014

October 21, 2014

Posted by **Ry** on Thursday, October 17, 2013 at 8:58pm.

- Pre Algebra -
**Anonymous**, Thursday, October 17, 2013 at 9:01pmIf you think about the 6 tests as one big test, there are 600 marks overall. Wilbur got 88.5 * 4 = 354 out of the first 400 marks.

Now, to get 90 overall, you need 0.9*600 = 540 out of 600 marks. Now, 540-354 = 186, so that he must get 186 out of the next 200 marks. This translates to an mean of 186/2 = 93 for each of the last 2 tests.

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