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PASSAGE - 5
Box 1 contains three cards bearing numbers 1, 2, 3; box 2 contains five cards bearing numbers 1, 2, 3, 4, 5; and box 3 contains seven cards bearing numbers 1, 2, 3, 4, 5, 6, 7. A card is drawn from each of the boxes. Let xi be number on the card drawn from the ith box, i = 1, 2, 3. (JEE Adv. 2014)
Q. The probability that x1 + x2 + x3 is odd, is
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
PASSAGE - 5Box 1 contains three cards bearing numbers 1, 2, 3; box 2 c...
x1 + x2 + x3 will be odd If two are even and one is odd or all three are odd.
∴ Required probability = P (EEO) + P(EOE) + P(OEE) + P(OQO)
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PASSAGE - 5Box 1 contains three cards bearing numbers 1, 2, 3; box 2 contains five cards bearing numbers 1, 2, 3, 4, 5; and box 3 contains seven cards bearing numbers 1, 2, 3, 4, 5, 6, 7. A card is drawn from each of the boxes. Let xi be number on the card drawn from the ith box, i = 1, 2, 3. (JEE Adv. 2014) Q. The probability that x1 + x2 + x3 is odd, isa)b)c)d)Correct answer is option 'B'. Can you explain this answer?
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