In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how many read both papers?

sammykrane

11 years ago

it is 40-x+x+30-x=50

IBenedict

9 years ago

20 is the correct ans

precious osam

12 years ago

Admin please check the answer well, i agree with FamDamSam, its 10 meaning its empty set, 0 persons read both.

cos -x-x = -2x

Sensei

2 months ago

it is A

FamDamSam

12 years ago

Please, check this answer admin. The correct answer should be option A...... check you workings also proof that

AlexDr

3 months ago

40+30=70
70-50=20.. √😏