SOLUTION: Flow baked 12 buttermilk pancakes, 15 blueberry pancakes . How many banana pancakes does she need to bake to have the odds of picking a banana pancake 1/10 I think the answer i

Algebra ->  Statistics  -> Normal-probability -> SOLUTION: Flow baked 12 buttermilk pancakes, 15 blueberry pancakes . How many banana pancakes does she need to bake to have the odds of picking a banana pancake 1/10 I think the answer i      Log On


   

Question 995372: Flow baked 12 buttermilk pancakes, 15 blueberry pancakes . How many banana pancakes does she need to bake to have the odds of picking a banana pancake 1/10
I think the answer is three but I can't explain why
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
12+15 = 27 pancakes total so far

Let x = number of banana pancakes

x banana pancakes out of 27+x total gives the probability x/(27+x)

we want this probability to be 1/10, so,

x/(27+x) = 1/10
10*x = 1*(27+x)
10x = x+27
10x - x = 27
9x = 27
x = 27/9
x = 3

You need 3 banana pancakes