Probability that one random variable is greater than another

Suppose I have two random variables:

Control = BetaDistribution[24,141] Var = BetaDistribution[30,151] 

I can sample from this easy enough with RandomVariate[Var, 10] and calculate the probability that one of the distributions is greater than a constant, e.g. Probability[x <= .2, x \[Distributed] Var].

But how do I calculate $ P(Var>Control)$ . Many thanks!