Asked by Ali
Two dice are tossed simultaneously. What is the probability that “either the sum of top faces of dice is six
or both top faces are similar”?
or both top faces are similar”?
Answers
Answered by
Reiny
sum of six:
1,5 2,4 3,3 4,2 5,1 ---> 5 ways
top faces the same:
1,1 2,2 3,3 4,4 5,5 6,6 ---> 6 ways
number of ways of our event = 5+6-1 (can't count the 3,3 twice)
= 10
prob(of our event) = 10/36 = 5/18
1,5 2,4 3,3 4,2 5,1 ---> 5 ways
top faces the same:
1,1 2,2 3,3 4,4 5,5 6,6 ---> 6 ways
number of ways of our event = 5+6-1 (can't count the 3,3 twice)
= 10
prob(of our event) = 10/36 = 5/18
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