In a lottery, tickets are numbered using the digits 0, 1, 2, 5, 7, 8 and the numbers on tickets should be distinct and not start with 0. Rohan wants to buy a ticket and ask the shopkeeper to help him select one which has more chances of winning. Shopkeeper gives him hints in order to help him.
What will be the probability of Rohan's winning the lottery when the shopkeeper hints that
(i) Rohan may win if even numbers occupy even places.
(ii) Rohan may win if the number is divisible by 5.
. . . . . .
what grade?
(i) oeoeoe
(ii) oeoeo0
so there are 3!2! = 12 possibly winning choices, out of 5*5! = 600 possible numbers
P(winner) = 12/600 = 1/50