Date | May 2017 | Marks available | 2 | Reference code | 17M.1.SL.TZ1.S_1 |
Level | Standard Level | Paper | Paper 1 (without calculator) | Time zone | Time zone 1 |
Command term | Find | Question number | S_1 | Adapted from | N/A |
Question
In a group of 20 girls, 13 take history and 8 take economics. Three girls take both history and economics, as shown in the following Venn diagram. The values and represent numbers of girls.
Find the value of ;
[2]
a.i.
Find the value of .
[2]
a.ii.
A girl is selected at random. Find the probability that she takes economics but not history.
[2]
b.
Markscheme
valid approach (M1)
eg
A1 N2
[2 marks]
a.i.
valid approach (M1)
eg
A1 N2
[2 marks]
a.ii.
valid approach (M1)
eg
A1 N2
[2 marks]
b.
Examiners report
[N/A]
a.i.
[N/A]
a.ii.
[N/A]
b.