Question 1192850
the sum of their scores has mean 265
the sd s are 21 and 24, the variances are 441 and 576. That sum is 1017, and the sqrt(1017)=31.89 for the combined sd.
z=(x-mean)/sd
>(275-265)/31.89=10/31.89=0.3136
probability z> 0.3136 is 0.3769