Question

a pair of dice is thrown ...find the probability of getting 7 as the sum if it is knwn that second die is always exihibts a prime number

Answer 1

second die : 2,3,5

to get 7, must be 5,4,2

probability = likely outcomes / all outcomes

i think it is 1/2 - don't trust me not a reliable source

Answer 2

r s k v east vinod nagar