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Solution


Q.

Let set A={x∈I+:f(x)=x3-8x2+20x-13 is a prime number}. Consider the statements:

Statement – I: Number of elements in set A is 3

Statement – II: Sum of all elements in set A is 9, then
1 Both Statement – I and Statement – II are true  
2 Statement – I is true and Statement – II is false  
3 Statement – I is false and Statement – II is true  
4 Both Statement – I and Statement – II are false  

Ans.

(1)

A={2,3,4}