In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how many read both papers?
Let C n G = X
n C only = 40 - x
n G only = 30 - x
40 - X + 30 - X + X = 50
70 - X = 50
X = 70 - 50
X = 20
There is an explanation video available below.
Contributions ({{ comment_count }})
Please wait...
Modal title
Report
Block User
{{ feedback_modal_data.title }}