7.24) A random value has a normal distribution with the mean 102.9 and the standard deviation = 4.7. What are the probabilities that this random value will also take on a value

a) less than 110.1;

b) greater than 95.6;

c) between 104.5 and 105.9;

d) between 98.7 and 105.0?

7.26) The lengths of the sardines received by a cannery have a mean of 4.64 inches and a standard deviation of 0.25 inch. If the distribution of these lengths can be approximated closely with a normal distribution, what percentage of all these sardines are

a) shorter than 4.00 inches;

b) from 4.40 to 4.80 inches long?

7.31) In a municipal parking lot, the number of parking tickets issued daily for overtime parking is a random variable with = 15.3 and = 3.4. What is the probability that on any day exactly 20 tickets will be issued in this parking lot?