The correct word is degrees
The probability of popping a purple balloon is 2 out of 15
Currently, the standard deviation is 10, because on average the cards were $10 away from the mean.
Adding another card with value $25 would decrease the standard deviation because it is closer to the mean the the current standard deviation.
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Find the multiplier:
1 - (30/100) = 0.7
Multiply the price by this:
99.50 x 0.7 = 69.65.
You would pay $69.65
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- Ally ✧
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The one on the left is -5/6
The one on the right is 1/21
