Answer:
An estimate of the number of female members who are over 50 years of age is 28 members
Step-by-step explanation:
The covered area art
0 - 20 = 1.6 * 20 = 32
20 - 30 = 1.9 * 10 = 19
30 - 40 = 1.8*10 = 18
40 - 60 = 1.1 * 20 = 22
> 60 = 0.8*30 = 24
Adding together gives;
32 + 19 + 18 + 22 + 24 = 115
The number of members that are 50 years and over is given as follows;
Half of the members in the 40 to 60 range plus all members that are over 60
Which give;
1/2*22 + 24 = 35
Given that 80% of the members over 50 are female, we have that the number of members that are female and over 50 = 0.8*35 = 28 members.
