2024-From the data 1, 4, 7, 9, 16, 21, 25, if all even numbers are removed, then the probability 

From the data 1, 4, 7, 9, 16, 21, 25, if all even numbers are removed, then the probability of getting at random a prime number from the remaining is :
(a) 2/5 (b) 1/5 (c) 1/7 (d) 2/7