Question

The probability of getting exactly 4 tails when
6 unbiased coins are tossed is​

Answer 1

Answer:

2/3

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Answer 2

Answer:

SOLUTION

TO DETERMINE

The probability of getting exactly 4 tails when 6 unbiased coins are tossed

EVALUATION

When 6 unbiased coins are tossed then the total number of possible outcomes

= {2}^{6}=26

= 64=64

Let A be the event that of getting exactly 4 tails

Then the total number of possible outcomes for the event A is

\sf{ = {}^{6}C_4 }=6C4

= 15=15

Hence the required probability

= P(A)

\displaystyle \sf{ = \frac{15}{64} }=6415

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