A dice is thrown twice. What is the probabilities of getting sum as 2.3,4,5,6,7,8,9,10,11,12 on each dice
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Answers
Answer:
Throwing a die twice and throwing two dice simultaneously are treated as the same experiment.
Sample space ={(1,1),(1,2),(1,3),(1,4),(1,5),(1,6)
(2,1),(2,2),(2,3),(2,4),(2,5),(2,6)
(3,1),(3,2),(3,3),(3,4),(3,5),(3,6)
(4,1),(4,2),(4,3),(4,4),(4,5),(4,6)
(5,1),(5,2),(5,3),(5,4),(5,5),(5,6)
(6,1),(6,2),(6,3),(6,4),(6,5),(6,6)}
i) P(5 will not come up either time)= Number of times 5 does not show divided by total number of outcomes
P(5 will not come up either time)= 25
36
ii) P(5 will come up at least once)= Number of times 5 shows up at least once divided by total number of outcomes
P(5 will come up at least once)= 11
36
Answer:
(ii) Number of events when 5 comes at least once = 5 + 6 = 11
The required probability 11/36