Real Numbers

Question

A bag contains tickets, numbered 11, 12, 13,..........30. A ticket is taken out from the bag at random. Find the probability that the number on the drawn ticket (i) is a multiple of 7 (iii) is greater than 15 and a multiple of 5.

Solution

Solution not provided.
Ans. $3 over 20 comma space space 3 over 20$