The table below shows the number of students in each class in a school. The percentage (%) of the students in each class who wear glasses is also shown.

Class | Form 1 | Form 2 | Form 3 | Form 4 |

Number of students | 60 | 56 | 44 | 40 |

Percentage (%) with glasses | 10% | 12.5% | 25% | 17.5 |

- A student is chosen at random from the school.

Determine the:- probability that the student is in form 4.
- probability that the student wears glasses.

- Two students are chosen at random from the school.

Determine the:- probability that one of the two students is in form 1 while the other student is in form 4.
- probability that one of the students is in form I while the other is in form 4 and both wear glasses.