Why 40% =0-20% but 54%=95% when researching T2 BPC?

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This is no accident. Always at 40% of 10 drawings, only 0-2 Т2 will be successfully generated. Never 3. And always at 54% 9-10 T2 will be created. This is not a blind accident. This is misleading.

And this assumption is not even close to reality. If a scientist copied and created several thousand drawings, if he studied many sciences at 5, why should he be so often wrong? What the hell? Is he copying and studying on a stone table by the fire? Is there no other way to take money and time away from pilots?