Question

A die is thrown twice. What is the probability that 5 will notcome upeither

Answer 1

total number of outcomes =36and 5willnot come up=11so 36-11=25 probability=25/36

Answer 2

let be the total no of outcomes be n(s)

n(s): (1,1) (2,1) (3,1) (4,1) (5,1) (6,1)

(1,2) (2,2) (3,2) (4,2) (5,2) (6,2)

(1,3) (2,3) (3,3) (4,3) (5,3) (6,3)

(1,4) (2,4) (3,4) (4,4) (5,4) (6,4)

(1,5) (2,5) (3,5) (4,5) (5,5) (6,5)

(1,6) (2,6) (3,6) (4,6) (5,6) (6,6) = 36

the probability that 5 will not come up either = (5,1) (5,2) (5,3) (5,4) (1,5) (2,5) (3,5) (4,5) (5,5) (6,5) (6,5) =11

= 36-11=25

= 25/36