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3 years ago

Val tossed a coin 20 times. The results were 8 heads and 12 tails. What is the experimental probability of tossing heads?

Mathematics

1 answer:

Andrew [12]3 years ago

4 0

Answer:

2/5 or 0.40

Step-by-step explanation:

Val's result for heads is ...

8/20 = 2/5 = 0.40

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Determine if the following statement is true or false.

Alla [95]

Answer:

A. True

Step-by-step explanation:

The general formula for predicting an outcome in a binomial probability distribution function is: nCx(p)^x(q)^(n-x)

where p is the probability of success and q is the probability of failure

From the above formula; nCx represent the number of ways of obtaining x successes in n trials.

nCx is a combination computation and combination helps to determine in how many ways a certain outcome is possible.

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4 years ago

What is the simpler form of (2x-6)^2

KatRina [158]

(2x - 6)^2 = (2x - 6)(2x - 6) = 4x^2 - 12x - 12x + 36 = 4x^2 - 24x + 36

6 0

4 years ago

Read 2 more answers

under a dilation, the point (2,6) is moved to (6,18) what is the scale factor of the dilation? enter your answer in the box

Anestetic [448]

Step-by-step explanation:

The equation of line passing through the two points is $\frac{y-y_{1} }{x-x_{1} }=\frac{y_{2} -y_{1}}{x_{2} -x_{1}}$

When substituted,the equation becomes $\frac{y-6}{x-2}=\frac{18-6}{6-2}$

which when simplified is $y=3\times x$

The line clearly passes through origin.

The distance between two points is $\sqrt{(y_{1}-y_{2} )^{2}+(x_{1}- x_{2} )^{2}}$

Distance between origin and $(2,6)$ is $\sqrt{40}$ .

Distance between origin and $(6,18)$ is $\sqrt{360}$

Scale factor is $\frac{distance\text{ }of\text{ }p_{2}\text{ from origin}}{distance \text{ } of \text{ } p_{1}\text{ from origin}}$

So,scale factor is $\frac{\sqrt{360} }{\sqrt{40} }$

which when simplified becomes 3.

6 0

3 years ago

A number is chosen at random from the first 20 integers. Find the probability that the number is a multiple of 3.

Fofino [41]

Answer:

3/10

Step-by-step explanation:

Multiples of 3: 3,6,9,12,15,18

There are 6 in the numbers 1-20

P(multiple of 3) = number of "multiples of 3" / total

= 6/20

=3/10

4 0

3 years ago

Help with #20 please!!!!!

shepuryov [24]

Remember that things like this, always need to add up to 180°.

7 0

4 years ago