Let X∼Normal(μ,σ2)X \sim \text{Normal}(\mu, \sigma^2)X∼Normal(μ,σ2). If P(X≤100)=0.975P(X \le 100) = 0.975P(X≤100)=0.975, and Var(X)=400Var(X) = 400Var(X)=400, what is μ\muμ?
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