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A die is thrown once. Find the probability of getting a number that is either composite or prime.​
  • a)
    4/6
  • b)
    3/6
  • c)
    6/6
  • d)
    5/6
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A die is thrown once. Find the probability of getting a number that is...
The possible outcomes when a dice is thrown = {1, 2, 3, 4, 5, 6}

Number of possible outcomes of a dice = 6

Prime numbers on a dice are 2, 3, and 5.
Composite numbers on dice = 4, 6

Total prime numbers on a dice = 3
Total composite numbers on a dice  = 2
So, total (prime + composite) = 5

Probability of getting a number that is either prime or composite = 5/6
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Most Upvoted Answer
A die is thrown once. Find the probability of getting a number that is...
1 is neither prime nor composite ..

so,P(E)=(2,3,4,5,6)/(1,2,3,4,5,6) I.e. 5/6 .. (D)
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Community Answer
A die is thrown once. Find the probability of getting a number that is...
The possible outcomes when a dice is thrown = {1, 2, 3, 4, 5, 6}
Number of possible outcomes of a dice = 6
Prime numbers on a dice are 2, 3, and 5.
Composite numbers on dice = 4, 6
Total prime numbers on a dice = 3
Total composite numbers on a dice  = 2
So, total (prime + composite) = 5
Probability of getting a number that is either prime or composite = 5/6
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