Question

in a class test of 45 students ,23students passed in paper first,15 passed in paper first but not passed in paper second .using set theory results,find the number of students who passed in both the papers and who passed in paper second but did not pass in paper first​

Answer 1

Answer:

check explanation

Step-by-step explanation:

let students who passed paper 1 be denoted by set A

let students who passed paper 2 be denoted by set B

A=23

Now A-B=15

therefore those who passed both tests=23-15=8

assuming no one failed,

number of students who passed 2nd test and not 1st=45-23=22