Mohan post a letter to Sohan. It is known that one letter out of `10 `letters do not reach its destination. If it is certain that Sohan will reply if he receives the letter. If `A` denotes the event that the Sohan receives the letter and `B` denotes the event that Mohan gets a reply, then

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' 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.

Consider the word POSSIBILITY. In the arrangement of the letters of the above word let A and B denote the event that the 2 S's are together and the 3I's are together respectively, then

Consider the word POSSIBILITY. In the arrangement of the letters of the above word let A and B denote the event that the 2 S's are together and the 3I's are together respectively, then

Consider the word POSSIBILITY. In the arrangement of the letters of the above word let A and B denote the event that the 2 S's are together and the 3I's are together respectively, then

Consider the word POSSIBILITY. In the arrangement of the letters of the above word let A and B denote the event that the 2 S's are together and the 3I's are together respectively, then

One day an army group won a land battle against the enemy. The commander feared that the enemy's powerful air force might bomb his camp that night in revenge. So he ordered all lights to be put out at 7:00 PM. At midnight the commander went round inspecting the camp. Seeing a light in a tent, he entered it. His son, an officer under him, was writing a letter. The son explained that he was writing to his mother about his brave deeds in battle. The commander told his son to add to his letter that by the time his mother received the letter he would have been shot dead for indiscipline. The commander entered his son's tent because he

'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 .

Directions: Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. The concert has started when he reached the venue.