20 plants were measured and their heights recorded in cm. Here are the heights:
b) Draw a frequency polygon
8.2 6.5 2.7 19.4
to represent the data.
16 14.1 17.1 14
8
4.9 2.9 15.5 7.3
15 4.4 11.8 13.9
7
10.2 4.6 19.5 7.3
6
Frequency
3
a) Complete the frequency table.
Height, h cm Frequency
0 5
5 10 15 2
1
0
0
20
5 10
15
Height, h (cm)

Aclothing store has just advertised at a bargain price, that a customer tries on a t-shirt is 0.40. a new range of t-shirts. the probability if a customer tries a t-shirt, the probability that they will buy it is 0.70 while if a customer does not try on a t-shirt, the probability that they will buy it is 0.15. a customer has just bought a t-shirt. find the probability that the customer did not try on the t- shirt.