A person's name is STEVE. If any 2 letters are interchanged, what is the probability that the spelling is still correct?
Hi,
STEVE - 5 letters
Two letter can be interchanged by picking 2 letters in 5C2 = 10ways
For the spelling to be correct, the 2 letter selected should be E,E - 1 way
So, probability is 1/10.












