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In a lottery there are 10 prizes and 25 blanks. What is the probability of getting a prize?

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Total no. of possible outcomes = 35 {10 prizes, 25 blanks}

E ⟶ event of getting prize

No. of favourable outcomes = 10 {10 prizes}

Probability, P(E) = (No.of favorable outcomes)/(Total no.of possible outcomes) = 10/35 = 2/7

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