Add 2
3p = -3
Divide by 3
p = -1
<span>The common factors of 36 and 48 are 1, 2, 3, 4, 6, and 12
36-</span><span>1,2,3,4,6,9,12,18,36
48-</span><span>1, 2, 3, 4, 6, 8, 12, 16, 24, 48</span>
<span>if you have 21 bins then the 'middle bin' is bin 11 (starting at 1)
So the 'mean' of this distribution is 11.
The SD is 3
so using the above calculator (or your own tables ) you get that the probability of a ball being in bin 7 or less is .091
A is you answer
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