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Solution


Q.

From the data 1, 4, 7, 9, 16, 21, 25, if all the even numbers are removed, then the probability of getting at random a prime number from the remaining is :
1 2/5  
2 1/5  
3 1/7  
4 2/7  

Ans.

(2)

Given data : 1, 4, 7, 9, 16, 21, 25

After removing even numbers data is: 1, 7, 9, 21, 25

Prime number : 7

Thus, required probability = 1/5