Adults have Intelligent test scores which are normally distrubted with mean of 100 and standard deviation of 15.
A.) Determine probability that a randomly selected a adult has an IQ less than 110
B.) Determine the probabillity that a randomly selected adult has an iq greater than120.
C.) Determine the probabillity that a randomly slected adult has an IQ between 90 and 110.
D.) Determine the probabillity that a randomly selected adult has an IQ between 110 and 120.