Master Letter writing Part 4 in 45 min

Find the ratio of 4 min: 45 sec

A person writes 4 letters and addresses on 4 covers. If these letters are inserted in covers randomly then ....... is the probability that all letters are not in proper cover.

How to Write a Letter to The Editor|Letter Writing Format|Question|Complain Letter

How to Write a Letter to The Editor|Letter Writing Format|Question|Complain Letter

How to Write a Letter to The Editor|Letter Writing Format|Question|Complain Letter

Letter: Format|Introduction|Parts Of A Letter - A Letter Consists Of Six Different Part:|Salutation & Greeting|Questions|Letter To Editor|Summary

Letter: Format|Introduction|Parts Of A Letter - A Letter Consists Of Six Different Part:|Salutation & Greeting|Questions|Letter To Editor|Summary

There are 4 letters and 4 directed envelopes. Write the number of ways such that two letters are kept in the right envelopes.

If the letters of the word MASTER are permuted in all possible ways and the words thus formed are arranged in the dictionary order, then find the ranks of the words i) REMAST ii) MASTER