It was very difficult to operate these statements in my head. So I used a diagram for overlapping sets.
I used 100 people who placed order as total (convenient for % problems)
I plugged in 99 people as people under age 35 who ordered merchandise (includes both subscribers and non-subscribers). Why 99? 99 can absolutely refer to most of people who placed order.
When I looked over the answers, I checked with my table:
(A) In my table there are only people who placed order. We don't know anything
...
Attachments![table.jpg]( "table.jpg")
table.jpg [ 63.39 KiB | Viewed 11 times ]
I used 100 people who placed order as total (convenient for % problems)
I plugged in 99 people as people under age 35 who ordered merchandise (includes both subscribers and non-subscribers). Why 99? 99 can absolutely refer to most of people who placed order.
When I looked over the answers, I checked with my table:
(A) In my table there are only people who placed order. We don't know anything
...
Attachments
table.jpg [ 63.39 KiB | Viewed 11 times ]
.jpg)
