(b) In another class the students all study at least one language from French, German and Spanish. No student studies all three languages.
The set of students who study German is a proper subset of the set of students who study French.
4 students study both French and German.
12 students study Spanish but not French.
9 students study French but not Spanish.
A total of 16 students study French.
(i) Draw a Venn diagram to represent this information
[4]
(ii) Find the total number of students in this class.

(Cambridge IGCSE Mathematics 0580 Paper 42 09 October/November 2012)

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Louis wants to carpet the rectangular floor of his basement the basement has an area of 864 square feet the width of the basement is 2/3 its length what is the length of lewis's basement

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.