Answer: 


The given digits are 2, 3,
5, 7 , 9 and we need to form two digits numbers without repeating the digits




∴ n(S)
= 20




(a) Let A = Event of
getting an odd number.


∴ A
= { 23, 25, 27, 29, 35, 37, 39, 53, 57, 59, 73, 75, 79, 93, 95, 97}


∴n(A) = 16






(b) Let B = Event of
getting the two – digit number so formed is a multiple of 5.


B = { 25, 35, 75, 95}


∴ n(4)
= 4



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What is the probability of two – digit number formed from the digits 2, 3, 5, 7, 9 without repeating the digits of the events? (a) the number so formed is an odd number. (b) the two – digit number so formed is a multiple of 5.
What is the probability of two – digit number formed
from the digits 2, 3, 5, 7, 9 without repeating the digits of the events?
(a) the number so formed is an odd number.
(b) the two – digit number so formed is a multiple of
5.