Quantitative Aptitude Interview Question:

After the typist writes 12 letters and addresses 12 envelopes, he inserts 1 letter per envelope randomly into the envelopes. What is the probability that exactly 1 letter is inserted in an improper envelope?

Submitted by: Administrator

as 1 letter cannot be in improper envelope. there has to be more than 1 letter that is in improper envelope
Submitted by: Administrator