Devs I need an answer

One mistake, not half for each

Just curious to know how this is calculated if there are 32 legendaries 56 SE and 69 E.(according to me)
Chances of getting a legendary is 4% from a single pack
so is it something like this or am I completely wrong.
(32/157)*(4/100)*10

0.96 to not get a legend
0.96^10 to not get a legend at all from 10 eggs
1-0.96^10 to get at least 1

Simplified calculations.
Nice one.