3bet allin 20bb

This is maybe a hard question but would be fun to hear what you guys think

Do you guys know how often a 3bet allin needs to work to brake even when someone raises to 2.25bb on CO and you push 20bb on BTN with your equity hand JTs, A5s & 76s against their range?

JTs and 76s - no way to have any advantage against any combo with Ax Kx Qx (probable CO range)
but A5s have at least 56% against Kx combos

What street are you talking about? Preflop or flop on?

I do not understand. There are not many factors that influence the decision made, what is the depth of the stack, information about the opponent, what stage of the tournament, and so on.
If the opponent is unknown, it depends on your 3-bet range in CO.