Probability — Class 12 Maths Solution

exemplar objective MCQ NCERT,Exemp,Q.80,Page.283
Question

A flashlight has 8 batteries out of which 3 are dead. If two batteries are selected without replacement and tested, then probability that both are dead is

  • (a) $\frac{{33}}{{56}}$
  • (b) $\frac{9}{{64}}$
  • (c) $\frac{1}{{14}}$
  • (d) $\frac{3}{{28}}$ ✓ Correct
Step-by-step Solution
Correct answer: option (d)

Required probability $= {P_D} \cdot {P_D} = \frac{3}{8} \cdot \frac{2}{7} = \frac{3}{{28}}$

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NCERT & Exemplar solution for CBSE Class 12 Mathematics, Probability. Curated by Sachin Sharma. Free for all students.