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tatyana61 [14]
2 years ago
11

The table shows the color preferences of 50 shoppers at the mall. What is the probability that one shopper, selected at random f

rom the 50 surveyed, preferred the color red or blue? Red 7, yellow 3, blue 13, green 15, orange 12. I think it is 2/5
Mathematics
2 answers:
Nuetrik [128]2 years ago
6 0
20/50=2/5=0.4=40%
So yeah, 2/5 or 0.40 or 40%
They're all equal.
Hope this helps.
otez555 [7]2 years ago
3 0

Answer: There is probability of getting red or blue is 40%.

Step-by-step explanation:

Since we have given that

Number of preferences for red = 7

Number of preferences for yellow = 3

Number of preferences for blue = 13

Number of preferences for green = 15

Number of preferences for orange = 12

Total number of preferences = 50

So, Probability of getting red or blue is given by

P(Red) + P(Blue)

=\dfrac{7}{50}+\dfrac{13}{50}\\\\=\dfrac{20}{50}\\\\=\dfrac{2}{5}\\\\=0.4\\\\=40\%

Hence, there is probability of getting red or blue is 40%.

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Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
frozen [14]

Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

\sigma=7

Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

Hence, the raw score for Daniel's exam grade = 101.69

3 0
2 years ago
Please I need this too NOww PLEASE ASAP
FromTheMoon [43]

Answer:

∠ ABC = 53.5°

Step-by-step explanation:

The inscribed angle ABC is half the measure of the intercepted arc AC

∠ ABC = \frac{1}{2} × 107° = 53.5°

5 0
3 years ago
90 is 120% of what number?
Murrr4er [49]

Answer: The answer is 75

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Nine more than the quotient of a number and 5 is -22
rusak2 [61]

Answer:

number is -155

Step-by-step explanation:

let the number equal 'x'

quotient means divide

nine more means plus 9

quotient of a number and 5 means x divided by 5

9+ x/5 = -22

now to solve for x

x/5 = -31

x = -155

5 0
2 years ago
Find an expression for f−1(x), if f(x) = 5 − 2x
Lesechka [4]

Answer:

f^{-1}(x) = \frac{5-x}{2}

Step-by-step explanation:

Let y = f(x) and rearrange making x the subject

y = 5 - 2x ( add 2x to both sides )

2x + y = 5 ( subtract y from both sides )

2x = 5 - y ( divide both sides by 2 )

x = \frac{5-y}{2}

Change y back into terms of x

f^{-1} (x) = \frac{5-x}{2}

8 0
3 years ago
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