A Sunday edition of the newspaper has 585320 readers 63 of t

A Sunday edition of the newspaper has 585,320 readers. 63% of the readers are men. It is knwn that 12% of the women and 23% of the men that read this newspaper will read the book review section. Of a random sample of 200 readers is taken, what is the expected number of people that will read the book review section?

Solution

0.63* 0.23 * 200    +    (1-0.63) * 0.12 * 200

28.98 + 8.88 = 37.86