Question 1121525
Convert this to a normal approximation
np=mean or 450*0.65 or 292.5
sd=sqrt (V), where V=292.5*0.35=102.375, so sd=10.12
use 289.5 as continuity correction factor for 290
(289.5-292.5)/10.12 is the z value for a, and that is -0.30
The probability z>-0.30 is 0.6179

fewer than 300 use (299.5-292.5)/10.12, and z < 0.69  Probability z < 0.69 is 0.7549

more than 280 use 280.5 (280.5-292.5)/10.12 and z > -1.19, with probability of 0.8830