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Probability — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsProbability1 Mark
MCQ
A box contains 10 good articles and 6 with defects. One item is drawn at random. The probability that it is either good or has a defect is,
  • ✓
    $\frac{64}{64}$
  • B
    $\frac{49}{64}$
  • C
    $\frac{40}{64}$
  • D
    $\frac{24}{64}$
✓

Answer

Correct option: A.
$\frac{64}{64}$
P(good item) $=\frac{10}{16}$

P(defected item) $=\frac{6}{16}$

P(eitherr good or defected item) = P(good item) + P(defected item)

$=\frac{10}{16}+\frac{6}{16}$

$=\frac{16}{16}$

$=1$

$=\frac{64}{64}$

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