Question
What is the probability of getting a sum 9 from two throws of a dice?
Answer: Option C
In two throws of a dice, n(S) = (6 x 6) = 36
Let E = event of getting a sum
= {(3, 6), (4, 5), (5, 4), (6, 3)}
$$\eqalign{
& \therefore P\left( E \right) = \frac{{n\left( E \right)}}{{n\left( S \right)}} \cr
& = \frac{4}{{36}}\cr
& = \frac{1}{9} \cr} $$
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In two throws of a dice, n(S) = (6 x 6) = 36
Let E = event of getting a sum
= {(3, 6), (4, 5), (5, 4), (6, 3)}
$$\eqalign{
& \therefore P\left( E \right) = \frac{{n\left( E \right)}}{{n\left( S \right)}} \cr
& = \frac{4}{{36}}\cr
& = \frac{1}{9} \cr} $$
Was this answer helpful ?
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