NDA 2023
Exam NDA
Year 2023
Subject Mathematics
Chapter Probability
NDA 2023 · Mathematics · Probability
A fair coin is tossed 6 times. What is the probability of getting a...
A fair coin is tossed 6 times. What is the probability of getting a result in the 6th toss which is different from those obtained in the first five tosses?
Options A 7 16 \frac{7}{16} 16 7 B 1 16 \frac{1}{16} 16 1 C 1 32 \frac{1}{32} 32 1 D 1 64 \frac{1}{64} 64 1
Correct answer C. 1 32 \frac{1}{32} 32 1
Step-by-step solution
Let
E = { H H H H H T , T T T T T H } \mathrm{E}=\{\mathrm{HHHHHT}, \mathrm{TTTTTH}\} E = { HHHHHT , TTTTTH }
Now,
P ( E ) = 2 2 6 = 2 64 = 1 32 P(E)=\frac{2}{2^6}=\frac{2}{64}=\frac{1}{32} P ( E ) = 2 6 2 = 64 2 = 32 1
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