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CAHSEE Math 1.1 Mathematical Reasoning 228 Views
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Description:
CAHSEE Mathematical Reasoning: Drill 1, Problem 1. Based on this information, which of the following can be determined?
Transcript
- 00:03
Here’s your shmoop du jour…
- 00:05
Mark’s wife is convinced he doesn’t really know her… so she’s insisting he take a test all about her.
- 00:11
For Mark’s sake, we hope he passes. Assuming he still wants to be married.
- 00:15
It took two and a half hours to complete.
- 00:18
Mark spent an average of five minutes on each question. Not a good sign, Mark.
Full Transcript
- 00:22
A few days later, when his wife tallied the results,
- 00:25
she found that he had missed three of the questions.
- 00:27
Based on this information, which of the following can be determined?
- 00:30
And here are the potential answers...
- 00:36
OK, so this question is mainly just testing whether we can read carefully.
- 00:39
We have to approach the answers one by one. Take A.
- 00:42
Can we determine the total number of questions?
- 00:45
Well… yes – if the test took 2 and a half hours or 150 minutes to complete and he AVERAGED
- 00:50
5 minutes a question, then we can divide 5 into 150 and glean that the test was 30 questions.
- 00:57
So A is a true.
- 00:58
B. They give us that he missed 3… so 30 minus 3 is 27. Checkarooni for B.
- 01:04
C. Sure. 27 out of 30 is 91ish per cent.
- 01:09
So the answer is D – we know ALL of these.
- 01:12
By the way, if there was a choice E… “Mark is in the doghouse”… that one would have been true, too.
- 01:17
In marriage, an “A minus” doesn’t cut it…
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CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
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