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Find the probability of getting almost t...

Find the probability of getting almost two tails or at least two heads in a toss of three coins.

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The correct Answer is:
`(7)/(8)`
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KUMAR PRAKASHAN-PROBABILITY-PRACTICE WORK
  1. Three squares of chess board are selected at random. Find the probabil...

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  3. A and B are mutually exclusive event. If P(A)=(1)/(4),P(B)=(2)/(5) and...

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  4. A die is thrown twice. What is the probability that at least one of th...

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  5. A, B and C are mutually exclusive and exhaustive events. If P(B)=(3)/(...

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  6. Following Vann diagram show the probabilities of three events. Fi...

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  7. Find the probability of getting almost two tails or at least two heads...

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  8. A number is chosen at random from the numbers 20 to 50. What is the pr...

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  9. A basket contains 15 guava and 12 banana. Out of which 5 guava and 7 b...

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  10. If A and B are mutually exclusive events, P(A) = 0.35 and P(B)= 0.45, ...

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  11. Find the probability that when a hand of 7 cards is drawn from a well ...

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  12. In an interview for a job, 5 boys and 3 girls appeared. If 4 persons a...

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  13. A box contains 8 red, 3 white and 9 black balls. If three balls are dr...

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  14. A group consists of 3 men, 2 women and 4 children. If four persons are...

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  15. An integer is chosen at random from first 200 natural numbers. What is...

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  16. The probability that a student will receive A, B, C or D grade are 0.4...

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  17. A and B are mutually exclusive events. P(A)=0.28, P(B)=0.38, then find...

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  18. Without repetition of the numbers, four digit numbers are formed with ...

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  19. Three of six vertices of a regular hexagon are chosen at random. What ...

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  20. Two dice are thrown together. What is the probability that sum of the ...

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