A coin is tossed seven times and the sequence of heads and tails is observed. what is the number of different outcomes having exactly three heads?

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14-03-2018
Mathematics

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A coin is tossed seven times and the sequence of heads and tails is observed. what is the number of different outcomes having exactly three heads?

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Аноним Аноним · Answer 1 · 2018-03-17T12:20:43+01:00

You could make a tree diagram
H T ← 1st toss

H T H T ← 2nd toss

H T H T H T H T ← 3rd toss
etc ,,, then count the combination of favorable outcomes

Using a calculator:
Total number of outcomes is [tex] 2^{7} [/tex] = 128
Probability of getting exactly 3 heads is found using the follow calculator feature: binompdf(7, 0.5, 3)

ANSWER: Typed into the calculator as follows binompdf(7,0.5,3)×128 = 35

A coin is tossed seven times and the sequence of heads and tails is observed. what is the number of different outcomes having exactly three​ heads?

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A coin is tossed seven times and the sequence of heads and tails is observed. what is the number of different outcomes having exactly three heads?