The flight crews of ABC Airline Company have a mean hourly wage of P480 with a standard deviation of P50. If a crew member is selected at random, what is the probability that the crew member earns: 1. from P400 to P500 2. more than P450 3. less than P550 4. at most P425 5. A personnel manager claims to have just hired someone with an IQ that belongs to the top 5% of all recent business school graduates. The relevant distribution of IQ's is known to be normal, with a mean of 120 points and a standard deviation of 10 points. If a graduate is chosen at random, what is the probability that his lQ score is: a. more than 115 b. lower than 135 gnitas lee lo pilidedong odr an C. between 125 and 130 who d. What should be the IQ of a person to be included in the top 5%?

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