Bunuel wrote:

The Venn diagram shows the enrollment of 400 college students in one or more of three classes: mathematics, English, and physics. What percent of the students are taking only mathematics or only physics and no other class?

(1) Of the 400 students, 240 are taking English.

(2) Of the 400 students, 190 are taking mathematics and 140 are taking physics.

Attachment:

2018-04-13_1313.png

(1) No info about Math and physics..

Hence Insufficient As there may be a few students not taking any of Phy, Math or english.

(2) 190 are total math... from the figure we can find out the only math part. ( 190 - 50 - 30 - 20 = 100) similarly for physics.

Suff to find only physics + only math.

Hence

Option (B) is our answer.

Best,

Gladi