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3 years ago

How many triangles are in the figure?

Mathematics

1 answer:

lubasha [3.4K]3 years ago

4 0

There are 38 triangles in the figure.

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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

CaHeK987 [17]

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:

$R=\frac{2n!}{m!*(2n-m)!}$

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:

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

For example, to toss 4 heads in 5 rounds:

n=5
2n=10
m=4

$P=\frac{10!}{4!*(10-4)!}*0.5^{10}$

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

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

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

8 0

3 years ago

What is 7 2/3 - 1 1/3

viktelen [127]

Change both fractions into improper fractions then subtract Ans=19/3 R 6 1/3

3 0

3 years ago

Read 2 more answers

Any sample from a group of people will be representative of the entire group. true false

Inessa [10]

The answer would be false

4 0

3 years ago

What is the area, in square meters, of the isosceles trapezoid below?

Greeley [361]

Answer:

Where is the triangle?

you might have to add a picture or a worded problem

Step-by-step explanation:

3 0

3 years ago

Please help ASAP ASAP ASAP

scZoUnD [109]

About 2.86 inches

Step by step explanation-

The formula for the volume of a cone is pi2 h/3 plugging the known numbers into formula you get
75=pi 5^2 h/2
H/3=0.955
H=2.86 inches

6 0

2 years ago