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प्रश्न
Kamalam went to play a lucky draw contest. 135 tickets of the lucky draw were sold. If the probability of Kamalam winning is `1/9`, then the number of tickets bought by Kamalam is
पर्याय
5
10
15
20
उत्तर
15
Explanation;
Hint:
n(S) = 135
P(A) = `1/9`
`("n"("A"))/("n"("S")) = 1/9`
⇒ `("n"("A"))/135 = 1/9`
n(A) = `135/9`
⇒ = 15
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