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NeTakaya
3 years ago
5

Candace bought three shirts each cost the same amount and discounted by three dollars and 66 cent Candace paid a total of 62.31

before tax .how much did each shirt cost before the discount?
Mathematics
1 answer:
nydimaria [60]3 years ago
6 0
62.31= (-3.66*3) +3x
62.31= -10.98+3x
       +10.98
73.29= 3x
        /3
24.43= x

Each shirt costs $24.43
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Answer:

\frac{92}{15}

Step-by-step explanation:

change to improper

\frac{24}{5}  +  \frac{4}{3}

this gives us

\frac{92}{15}

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kramer

Answer: C (1.25, 10.25)

Step-by-step explanation:

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Suppose that you have a bag containing 3 green marbles, 8 blue marbles and 13 red marbles. Suppose you reach into the
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The probability of randomly drawing either a red marble or a green marble is 80%

The probability of drawing a green marble is the same as the probability of drawing either a red or a blue marble.

3 out of 4

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Which statement is not true for a binomial distribution with n = 15 and p = 1/20 ? a) The standard deviation is 0.8441 b) The nu
malfutka [58]

Answer:

d) The highest probability occurs when x equals 0.7500

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability, given by the following formula:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

In this problem, we have that:

n = 15, p = \frac{1}{20}

a) The standard deviation is 0.8441

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{15*0.05*0.95} = 0.8441

This is correct

b) The number of trials is equal to 15

n is the number of trials and n = 15. So this option is correct.

c) The probability that x equals 1 is 0.3658

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 1) = C_{15,1}.(0.05)^{1}.(0.95)^{14} = 0.3658

This option is correct.

d) The highest probability occurs when x equals 0.7500

False. The number of sucesses is a discrete number, that is, 0, 1, 2,...,15. P(X = 0.75), for example, does not exist.

e) The mean equals 0.7500

E(X) = np = 15*0.05 = 0.75

This option is correct.

f) None of the above

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