21. Five mark exercise problem IV

Two unbiased dice are rolled once. Find the probability of getting (i) a doublet (equal numbers on both dice) (ii) the product as a prime number (iii) the sum as a prime number (iv) the sum as $1$.

 

Answer:

 

(i) A doublet $=$ $\frac{i}{i}$

 

(ii) The product as a prime number $=$ $\frac{i}{i}$

 

(iii) The sum as a prime number $=$ $\frac{i}{i}$

 

(iv) The sum as $1 =$