CAT Exam

These questions are based on the following information.
In a class, 60% of the students failed in Physics and 50% of the students failed in Biology.
The number of students who failed in Chemistry is 150% of the number of students passed
in Physics. 40 students passed in both Physics and Chemistry, 60 students passed in Biology
and Chemistry and 40 students failed in chemistry only. 20 students failed in all the three
subjects and 10 students passed in all the three subjects
How many students passed in Chemistry only?

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CAT Other Question
only for computer Q.Rahul’s age is three times the sum of his two children. After 5 years his age will be twice thesum of age his two children. Rahul’s present age is:
Option