Patients arrive at the emergency room of Mercy Hospital at the average rate of 12 in 60 minutes.

What is the probability that 10 patients will arrive in 60 minute?

what improbability that 4 patients Will arrive in 30 minutes?

if Z is a standard normal distribution, find the value of P9Z<0.75).

IfZis a standard normal distribution, find the value ofzsuch thatP(Z >z) = 0.2.

The cost of university education is normally distributed with students paying an average of $200 per week and a standard deviation of $50.

What is the probability that students pay less than $210 per week?

What is the probability that students pay between $190 and $210 per week?