Then X ~ Normal(mean = 0.260, sd = 0.07).
Calculate Pr(X > 0.4000). Multiply the answer by 100 to get %.
B.) Let Y be the random variable contemporary batting average.
Then Y ~ Normal(mean = 0.260, sd = 0.05).
Calculate Pr(Y > 0.4000). Multiply the answer by 100 to get %.
Without knowing how you've been taught to calculate for normal distributions (tables, technology such as TI-84, TI-89, statistics software, on-line probability calculators, numerical integration of the pdf etc.) it's impossible to say much more without wasting time .......