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STD 11 - 14. probability — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 14. probability4 Marks
MCQ
From a book containing $100$ pages, one page is selected randomly. The probability that the sum of the digits of the page number of the selected page is $11$, is
  • ✓
    $\frac{2}{{25}}$
  • B
    $\frac{9}{{100}}$
  • C
    $\frac{{11}}{{100}}$
  • D
    None of these
✓

Answer

Correct option: A.
$\frac{2}{{25}}$
a
(a) Favourable ways $\{ 29,\,92,\,38,\,83,\,47,\,74,\,56,\,65\} $

Hence required probability $ = \frac{8}{{100}} = \frac{2}{{25}}.$

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