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Question

A dice is thrown 300 times and the outcomes are noted as given below.
Outcome 1 2 3 4 5 6
Frequency 60 72 54 42 39 33
When a dice is thrown at random, what is the probability of getting a
(i) 3?
(ii) 6?
(iii) 5?
(iv) 1?

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Solution

Total number of throws = 300
In a random throw of a dice, let E1, E2, E3, E4, be the events of getting 3, 6, 5 and 1, respectively. Then,
(i) P(getting 3) = P(E1) = Number of times 3 appearsTotal number of trials = 54300 = 0.18

(ii) P(getting 6) = P(E2) = Number of times 6 appearsTotal number of trials = 33300 =0.11

(iii) P(getting 5) = P(E3) = Number of times 5 appearsTotal number of trials = 39300 = 0.13

(iv) P(getting 1) = P(E4) = Number of times 1 appearsTotal number of trials = 60300 = 0.20

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