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  • Two dice are thrown at the same time. (i) Find the probability of getting same number on both dice. (ii) Find the probability of getting different numbers on both dice.

Two dice are thrown at the same time.

(i) Find the probability of getting same number on both dice.
(ii) Find the probability of getting different numbers on both dice.

Answers (1)

Solution.     Probability ; probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one
Total number of cases after thrown of two dice = 36
(i) Same number = (1, 1), (2, 2), (3, 3), (4. 4), (5, 5), (6, 6)
Same number cases = 6
Let A be the event of getting same number.
Probability [p(A)] = \frac{Number\, of\, favourable\ cases }{Total\, number\, of\, cases}

p\left ( A \right )= \frac{6}{36}= \frac{1}{6}
(ii) Different number cases = 36 – same number case
= 36 –6 = 30
Let A be the event of getting different number
Probability [p(A)]= \frac{Number\, of\, favourable\ cases }{Total\, number\, of\, cases}

p\left ( A \right )= \frac{30}{36}= \frac{5}{6}

 

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