Spell and Trap are in the same category. So you would get 3 monsters, 1 spell or trap most of the time. But since the monster:spell&trap ratio is not exactly 3:1, it is possible to get 2 monsters, 2 spell/trap.
Sorry but. Can confirm spell and traps are different category. 10 duels with 13 monsters, 5 spells and 2 traps. Starting hand ALWAYS either 3 monster + 1 spell or 2 monster + 1 spell + 1 trap. I never got 3 monster + 1 trap.
If spell and trap in the same category, then 3 monster + trap is possible but, no
Anoymous 29days ago
Deck 0%Monster(M) 100%Spell/Trap(S/T)>4xS/T
Deck 25%M 75%S/T > 1M 3 S/T
Deck 50%M 50%S/T > 2M 2 S/T
and so on
Deck 80%M 20% S/T > 1M 2S/T 1Random
Whoever wrote that explanation is a total fuckwit.
Balance only affects STARTING HAND.
Afterwards, you draw randomly as per normal.
The skill description itself even just simply mentions the starting hand, nothing else.