8. A group of students were asked which after-school clubs they attended.
The Venn diagram below shows the answers given. 핌 Photography 6 52
(i) How many students were asked which after-school clubs they attended?
(ii) A student is chosen at random from the group. Calculate the probability that:
(a) the student goes to Photography club (b) the student goes to both clubs (c) the student doesn’t go to Coding club (d) the student doesn’t go to either club
(e) the student goes only to Photography club or Coding club, not both
(i) Calculate how many diff erent faces this identifi cation kit can produce. Give your answer in the following forms:
(a) The exact number
(b) The number rounded to three signifi cant fi gures
(c) The number written in words
(ii) The developer of the identifi cation kit claims that it can produce billions of diff erent faces. Is he correct? Justify your answer.
9 35 Coding
9. The Gardaí use photographs of various facial features to help witnesses identify suspects. One basic identifi cation kit contains photos of 195 hairlines, 99 eyes/eyebrows, 89 noses, 105 mouths and 74 chins/ cheeks.