Question

# In tossing a coin, the chance of throwing head and tail alternatively in 3 successive trials is

A
18
B
16
C
15
D
14

Solution

## The correct option is C $$\displaystyle \frac{1}{4}$$Total sample space is $$HHH, HHT, HTH, HTT, THH, THT, TTH, TTT i.e., 8$$.Here, head and tail alternatively occurs in $$2$$ occasions only.Therefore, probability will be$$=\dfrac{2}{8}$$$$=\dfrac{1}{4}$$Hence, this is the answer.Mathematics

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