Question

A person writes four letters and addresses four envelopes. If the letters are placed in the envelopes at random, then the probability that not all letters are placed in the right envelope is

• A. \( \frac{15}{24} \)
• B. \( \frac{11}{24} \)
• C. \( \frac{23}{24} \)
• D. \( \frac{1}{24} \)

Hint:

For problems asking “not all correct”, always consider the complement (all correct) and subtract from 1.

Answer 1

The Correct Option is C