4 years ago

Help me pleaseeeeeee

Mathematics

2 answers:

Nikitich [7]4 years ago

8 0

Answer:

Answer is third option no.4

hichkok12 [17]4 years ago

3 0

Answer:

The answer is 4 because 4 times 2 plus 1 equals 9 and 5 plus 4 equals 9 also

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On each round, Ann and Bob each simultaneously toss a fair coin. Let Xn be the number of heads tossed in the 2n flips which occu

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Answer:

$P=\frac{2n!}{m!*(2n-m)!}*0.5^{2n}$

Step-by-step explanation:

In a coin toss the probability of tossing a head is 0.5 (50% head/50% tails)

If n is the number of rounds and 2n the number of coins tossed (one for each player), the probability of having m heads tossed is:

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R is the number of cases (combination of coins tossed) that gives a m number of heads. Each case has a probability of $P_{case}=0.5^{2n}$ so:

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$P=\frac{10*9*8*7*6!}{4!*6!}*0.5^{10}$

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$P=\frac{10*9*8*7}{4!}*0.5^{10}=0.205$

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