Yes to get both equal to 1 / 2 we would need

Have you seen the answer given for,

]]>So, to have equal probability for both cases, we have to substitute 0.3 with 1-sqrt(0.50) = 1-0.707 = 0.292]]>

Is it greater than the probability to be > or equal to 0.3?

I am not understanding you here, the P(≥.3) = .49

Did you check your post about the towns?

]]>For what number (instead of 0.3) the probability for both cases is the same?]]>