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---------------------------- Original Message ---------------------------- Subject: Re: [Fwd: Re: Help] From: "Vsevolod Shneer" <[log in to unmask]> Date: Tue, October 11, 2005 8:20 pm -------------------------------------------------------------------------- Clearly, it is sufficient to consider the case a=1 (otherwise take y=x/a). Then, since 0 <= X <= 1, we have Var(X) = EX^2 - (EX)^2 <= EX - (EX)^2 = EX (1 - EX) <= 1/4. > > > Mariathas Judes Tagore writes: > > > Hi, > > Can you help me how to solve this problem? > > If P(0<= x <=a) = 1 show that var(x)<= a^2/4. > > > > Thank you > > Judes > > > > > > >