Question

At a DBE lecture of 100 students, there are 29 women and 23 men. Out of...

At a DBE lecture of 100 students, there are 29 women and 23 men. Out of these students, 4 are teachers and 24 are either men or teachers. Find the number of women teachers attending the lecture.   

Math   Statistics-And-Probability   
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Answer #1

Let W and M represent the set of women and men respectively , and T represent teachers

from the information given in the question we have

from the basic stuff we have

that is number of men teachers is 3,

so out of 4 teachers there are 3 men ,

and remaining 1 is the women teacher .

so the number of women teachers attending the lecture is 1

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