Question 1192606
what is 57 steps to either side? The midpoint is 507.5, so one wants 565/450 OR 450/565. This means that we want the number of steps to the right between 450 and 565.
can do a normal approximation
np=mean=1015*0.52=527.8. The mean number of steps to the right is 20.3 
variance is np(1-p)=253.34
sd=sqrt (V)=15.92
z=(x-mean)/sd so z>(-57.5-20.3)/15.92 and z<(57.5-20.3)/15.92. The .5 on each is for the continuity correction factor used when approximating a mass function with a continuous one.
z is between -4.89 and 2.34
This has probability of 0.9904 (last digit might change depending upon where you round z.)
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for more than 58 steps to the right, the probability is 0.0096.