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Rus_ich [418]
3 years ago
10

Mr.Clark takes 25 minutes to brush his teeth. Mrs. Clark spends

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
8 0

Answer:

30

Step-by-step explanation:

25 times 1.2= 30

Simora [160]3 years ago
4 0

Answer:

30

 Step-by-step explanation:

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A person is chosen at random. What is the probability that they passed the driving test?
Cerrena [4.2K]
<h3>Answer:  4/5</h3>

Explanation:

We have 24 adults who passed and 16 teens who passed. So 24+16 = 40 people passed total.

There are 24+8+16+2 = 50 people total

If you pick someone at random, the probability of them passing is 40/50 = 4/5.

In decimal form, this is 4/5 = 0.80 which converts to 80%

7 0
3 years ago
An unbalanced die is manufactured so that there is a 20% chance of rolling a “six." The die is rolled 6
SIZIF [17.4K]

Answer:

Probability of rolling at least 4 sixes is 0.01696.

Step-by-step explanation:

We are given that an unbalanced die is manufactured so that there is a 20% chance of rolling a “six." The die is rolled 6  times.

The above situation can be represented through binomial distribution;

P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r};x=0,1,2,3,.......

where, n = number trials (samples) taken = 6 trials

            r = number of success = at least 4

           p = probability of success which in our question is probability of

                 rolling a “six", i.e; p = 0.20

<u><em>Let X = Number of sixes on a die</em></u>

So, X ~ Binom(n = 6, p = 0.20)

Now, Probability of rolling at least 4 sixes is given by = P(X \geq 4)

P(X \geq 4) = P(X = 4) + P(X = 5) + P(X = 6)

=  \binom{6}{4} \times 0.20^{4} \times (1-0.20)^{6-4}+\binom{6}{5} \times 0.20^{5} \times (1-0.20)^{6-5}+\binom{6}{6} \times 0.20^{6} \times (1-0.20)^{6-6}

=  15 \times 0.20^{4} \times 0.80^{2}+6 \times 0.20^{5} \times 0.80^{1}+1 \times 0.20^{6} \times 0.80^{0}

=  0.0154 + 0.00154 + 0.000064

=  0.01696

<em />

Therefore, probability of rolling at least 4 sixes is 0.01696.

8 0
3 years ago
You spin a spinner with 5 sections: 1 blue (B) 1 purple (P), 1 red (R), 1 orange
baherus [9]

Answer:

B. (B P R O G)

Step-by-step explanation:

this answer includes the whole population of the sample space

8 0
3 years ago
Read 2 more answers
Marcie cooked dinner for herself. The original recipe has a serving size of 4 and requires four and four fifths pounds of chicke
Margarita [4]

Answer:

1.2 pounds of chicken per serving.

Step-by-step explanation:

4 and 4/5 of pounds of chicken for serving of 4.

We can also write this as 4.8 pounds of chicken.

To find how much pound of chicken will be needed for a single serving we have to divide 4.8 by 4.

\frac{4.8}{4}  = 1.2 \: pounds \: of \: chicken

If this answer helped you, give this answer a heart and rate it.

Thanks!

7 0
2 years ago
Which rule describes the composition of
ExtremeBDS [4]

Answer:

The second one: r x-axis. R 90(x,y)

Step-by-step explanation:

You can see that from ABC to A'B'C', it's rotated a positive 90 degrees. then, from A'B'C' to A"B"C", reflected across x-axis. and when writing the transformation, it goes by last to first. that's why the R 90 comes first.

8 0
2 years ago
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