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CAHSEE Math 1.1 Mathematical Reasoning 215 Views


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Description:

CAHSEE Mathematical Reasoning: Drill 1, Problem 1. Based on this information, which of the following can be determined?

Language:
English Language

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.

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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