Question: It is known that, when a stratigather is produced by a certain company, it may be either left handed or right handed. The probability that a particular stratigather will be right handed is 0.58, and that it will be left handed, 0.42. A thousand stratigathers are picked at random. Compute the probability
(a) That at least 400 of these are right handed.
(b) That between 400 and 600 are right handed.
(c) That no more than 450 are right handed.
(d) That exactly 520 are right handed.