Question

30. What is the probability that one number
picked from a set of 2 digit numbers is
(i) a multiple of 2 and 7
(ii) one digit is thrice the other (with Solution)​

Answer 1

multiple of 2 and 7 means it should be multiple of 14

14 , 28 , 42 , 56 , 70 , 84 , 98

probability = 7/90

13 , 26 , 39 , 31 , 62 , 93

probability = 6/90