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Statistics and Probability Videos 134 videos
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CAHSEE Math 2.4 Statistics, Data, and Probability II 169 Views
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Description:
Statistics, Data, and Probability II: Drill Set 2, Problem 4. Based on the following percentage breakdown of floor spaces for two homes, which of the following is true?
Transcript
- 00:03
Here’s an unshmoopy question you’ll find on an exam somewhere in life...
- 00:07
Based on the following percentage breakdown of floor spaces for two homes,
- 00:11
which of the following is true?
- 00:14
And here are the potential answers...
- 00:20
Can we read a pie chart?
Full Transcript
- 00:22
We just have to go through the potential answers here one by one until we can crown a winner.
- 00:27
So… A. “Both houses have the same amount of kitchen and bath space.”
- 00:36
Ooh… tricky.
- 00:37
Both houses have the same PERCENTAGE of square feet in their kitchen and bathroom
- 00:42
– but the 2nd house is twice the size of the first – so A is false.
- 00:47
B. “House 1 has more bedroom space than house 2."
- 00:51
Same as A - house 1 is bigger on a percentage basis, but because house 2 is twice the size,
- 00:58
B is false as well.
- 00:59
Ok… C. “House 1 has half the bedroom space of house 2.”
- 01:05
Well, no. The percentages are different – if they’d both been 40% then yeah, C would
- 01:10
be true, but in this case… nope.
- 01:12
D. “The two homes' living rooms have a combined floor space of 1,000 square feet.”
- 01:19
Well, let’s do the math.
- 01:20
35% of a 2,000 square foot home is 700 square feet… and then 30% of a 1,000 square foot
- 01:28
home is 300 square feet – add ‘em and we indeed have a thousand.
- 01:33
Ding ding ding! The answer is D.
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