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TSI Math: Recognizing How Changes Affect Probability 17 Views
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Description:
A bowl of jellybeans has 12 cherry, 13 grape, 17 lemon, and 10 orange jellybeans. Sandra takes out and eats a lemon jellybean. What has changed for the probability of pulling out a cherry jellybean since she ate a lemon one?
- Data Analysis, Statistics, and Probability / Probabilistic Reasoning
- Data Analysis, Statistics, and Probability / Probabilistic Reasoning
- TSI Math / Data Analysis, Statistics, and Probability
- Test Prep / TSI
- TSI Mathematics / Data Analysis, Statistics, and Probability
- TSI / TSI Math
- TSI / TSI Mathematics
- Test Prep / TSI
Transcript
- 00:02
Okay sy mash buffers Next up a bowl of jellybeans
- 00:05
has twelve cherry thirteen great seventeen lemon and ten orange
- 00:08
jelly beans Sandra takes out and eat a lemon jelly
- 00:12
bean What has changed for the probability of pulling out
- 00:15
a cherry jelly bean since she ate a lemon One
Full Transcript
- 00:23
So this problems right up our alley because we could
- 00:25
really use a goodly sized handful of jelly beans Yeah
- 00:28
we missed lunch again Seems like sandra i got to
- 00:30
the ball before us and sanders always eating and jelly
- 00:33
beans Yeah we're talking about you sandra We know we
- 00:35
know you do it well there's no sense in crying
- 00:37
over spilled jelly beans Let's figure this out she's taken
- 00:40
and eating a lemon jelly bean and now we're trying
- 00:42
to figure out how the probability of grabbing a cherry
- 00:44
has changed didn't go up to go down because of
- 00:47
the way the question is asked We know the cherry
- 00:50
probability is different because there's one less jelly bean total
- 00:53
This makes the cherry probability a dependent one if the
- 00:57
probability changes based on the outcome of another event it's
- 01:01
dependent upon that event so answer the question we need
- 01:04
to find the probability of meeting a cherry before sandra
- 01:06
even got her mitts on that lemon one there were
- 01:09
fifty two jellybeans at the beginning and twelve were cherry
- 01:13
giving us a before probability of twelve out of fifty
- 01:16
two or three out of thirteen if we reduce it
- 01:19
Well after sander eats the lemon one that leaves only
- 01:21
fifty one total jelly beans in the ball So the
- 01:24
denominator changes but they're still twelve cherry jelly beans so
- 01:28
it gives us an edge after probability of twelve over
- 01:31
fifty one So it looks like the numerator has stayed
- 01:33
the same but the denominator shrink So the odds of
- 01:37
you picking that cherry jelly bean went up when the
- 01:40
total jellybeans were reduced And while the answer here is
- 01:44
just be the denominator and we're the shmoop innate er 00:01:47.326 --> [endTime] in case anyone asks
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