write a letter to District minister in English for cutting electricity

'A' writes a letter to his friend 'B' and gives it to his son to post it in a letter box, the reliability of his son being 3/4 . The probability that a letter posted will get delivered is 8/9 .At a later date, 'A' hears from 'B' that the letter has not reached him. Find the probability that the son did not post the letter at all .

'A' writes a letter to his friend 'B' and gives it to his son to post it in a letter box, the reliability of his son being 3/4 . The probability that a letter posted will get delivered is 8/9 .At a later date, 'A' hears from 'B' that the letter has not reached him. Find the probability that the son did not post the letter at all .

Letter to the collector of your district the use of loud speaker for putting a restriction on the use of loud speaker

A person writes letters to six friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that all of them are in a wrong envelope

A' writes a letter to his friend B and oes not receive a reply, it is known that one out of 'n' letters does not reach it's destination. What is the probability that 'B' didn't receive the letter ? It is certain that 'B' would have replied , if he received the letter.

A code word consists of three letters of the English alphabet followed by two digits of the decimal system. If neither letter nor digit is repeated in any code word, then the total number of code words, is

Write the function of voltmeter in an electric circuit.

Write the three types of solids on the basis of their ability to conduct electric current.

Write three capital letters of the English alphabet that have line symmetry but not rotational symmetry?

Write three capital letters of the English alphabet that do not have line symmetry but have rotational symmetry?