If both firms used maximin strategies the outcome would be that Firm 1 does not invest and Firm 2 does. Suppose that Firm 1 thinks that there is only a 10-percent chance that Firm 2 will not invest. In that case,Firm 1's expected payoff from investing is 0.1×(-100)+0.9×(20)=8 Its expected payoff if it doesn't invest is 0.1×(0)+0.9×(-10)=-9. In this case,firm 1 should invest. If both firms used maximin strategies the outcome would be that Firm 1 does not invest and Firm 2 does.  Suppose that Firm 1 thinks that there is only a 10-percent chance that Firm 2 will not invest. In that case, Firm 1’s expected payoff from investing is 0.1×(-100) + 0.9 ×(20) = 8 Its expected payoff if it doesn’t invest is 0.1×(0) + 0.9 ×(-10) = -9. In this case, firm 1 should invest