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Three dice are thrown simultaneously. What is the probability that the sum on the three faces is at least 5?
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
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Three dice are thrown simultaneously. What is the probability that the...
As we know that 3 dice are thrown. We want prob. of sum on three faces at least 5 i.e. some may be 5 or more. We will find prob. of sum on three faces not 5 or less, i.e. sum on faces is 3 and 4 (1,2 is not possible because of 3 dice).
No. of ways for sum on faces not 5 or more = 4
[(1, 1, 1) , ( 1, 2, 1) , ( 1, 1, 2),(2, 1, 1)]
Total out comes = 216
Prob. of not 5 or more  
Prob. of sum on three faces at least 5
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Three dice are thrown simultaneously. What is the probability that the sum on the three faces is at least 5?a)b)c)d)Correct answer is option 'B'. Can you explain this answer?
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