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bekas [8.4K]
4 years ago
12

Rina Flipped a coin twenty times she flipped heads 4 times and tails 16 times what is the experimental probability that Rina wil

l flip heads in her next flip?
pls answer asap and pls explain but not to much THANK U
Mathematics
1 answer:
Triss [41]4 years ago
6 0

Answer: Assuming that all of the other variables when flipping the coin is constant. The experimental probability that Rina will flip heads in her next flip is 20%.

Step-by-step explanation:

Experimental Probability is the probability solely based on the results of the previous experiments done.

In this case the results of the previous experiments is 4 times landing on heads and 16 times landing on tails.

With this info, and with the question asking for the experimental probability of heads in her next flip, we can then set up a "proportion" using the number of times experimented (20 times; because 4 heads + 16 tails = 20 total times experimented) and the number of times it actually landed on heads in the past (4 times).

The proportion should be set up with the total number of times experimented the denominator and the number of times it landed on heads as the numerator.

So, the proportion should look like this,

4/20 = ___

evaluating the expression, in terms of percentage we get 20%

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A high school sewing club has 11 members. In how many different ways can they choose a president and vice president?
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Since the order matters  Person A and B can be chosen as AB (A pres B vice pres) or BA (B president  A Vice president)

When the order matters we are talking about permutations. How many permutations of 11 taken 2 at a time are there.
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It means start at 11 and multiply by the next lower number 
11 x 10 = 110 ways they can choose.
Extension of the concept:
If there had been three positions President, Vice President, and Treasurer
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A triangle has side lengths of 12 millimeters, 17 millimeters, and 13 millimeters. Is this triangle equilateral?
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Line bc is represented by 3x+2y=8 line ad is represented by -3x-2y=6 what is the relationship of line bc to line ad explain the
Bas_tet [7]

Answer:

The answer is below

Step-by-step explanation:

The equation of a straight line is given by:

y = mx + b

where m is the slope of the line and b is the y intercept (value of y when x = 0).

Given the equation of two lines as y=m_1x+b_1\ and\ y=m_2x+b_2, the two lines are parallel to each other if m_1=m_2. Also the lines are perpendicular if

m_1m_2=-1

Given line BC:

3x + 2y = 8

2y = -3x + 8

y = -3x/2 + 4

Hence the slope of the line BC = -3/2

For line AD:

-3x - 2y = 6

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Hence the slope of line AD is -3/2

Since both line BC and AD have equal slope (-3/2), hence both lines are parallel to each other

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3 years ago
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