Question

A unbiased dice are rolled. Find the probability of getting a sum greater than 8 and a sum of 8

Answer 1

sample space for a die rolled twice

11,12,13,14,15,16

21,22,23,24,25,26

31,32,33,34,35,36

41,42,43,44,45,46

51,52,53,54,55,56

61,62,63,64,65,66

now to get a sum greater than 8 ,

p = 10/36 = 5/18

to get a sum of 8 ,.

p = 5/36