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AlekseyPX
3 years ago
10

I need help on this question

Mathematics
1 answer:
givi [52]3 years ago
7 0

Answer:

Mexico

Step-by-step explanation:

It’s in Spanish

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A bowl contains 25 balls numbered 1 to 25. A ball is drawn and its number is noted. Without replacing the first ball, another ba
Afina-wow [57]

Step-by-step explanation:

n(S) = 25

Assume that O : odd numbers and E : even numbers,

n(O) = 13

n(E) = 25-13 = 12

P(OO) = P(O) x P(O)

= 13/25 x 12/24

(because without replacing so the number of balls left decreases)

= 13/25 x 1/2

= 13/50

7 0
3 years ago
Can someone please help me on 50.
Andrei [34K]
50) MAD=1.6

Follow steps...
<span>To find the mean absolute deviation of the data, start by finding the mean of the data set. Find the sum of the data values, and divide the sum by the number of data values. Find the absolute value of the difference between each data value and the mean: |data value – mean|. Find the sum of the absolute values of the differences. <span>Divide the sum of the absolute values of the differences by the number of data values.</span></span>
5 0
3 years ago
How much of an alloy with 30% copper must be added to 25 pounds of a second alloy that is 20% copper to create a 27% alloy? 33.8
yuradex [85]

Answer:

58.33 lbs.

Step-by-step explanation:

There are already 25 lbs of alloy of copper

Of this 25 lbs, 20% is pure i.e. copper content = 25(0.5) = 5lbs.

Now available is

Copper      Other metals

5 lbs                20 lbs

Let x lb of 30% copper is added.

Then new alloy will have 5+0.3x lb copper in total of 25+x lbs

Percentage pure = \frac{5+0.3x}{25+x} =27%

Simplify to get

\frac{5+0.3x}{25+x} =\frac{27}{100} \\\\Cross multiply:\\27(25+x) =100(5+0.3x)\\500+30x =675 +27x\\3x = 175\\x = 175/3 = 58.33 lbs

Hence answer is 58.33 lbs should be added.



8 0
3 years ago
Read 2 more answers
The 8th grade sells popcorn after school. The 2-cup container is $0.89, the 2 1 2 -cup container is $1.10, and the 3 1 2 -cup co
Free_Kalibri [48]

Answer:

the 2.5 cup

Step-by-step explanation:

0.89÷2=0.445

1.10÷2.5=0.44

1.75÷3.5=0.5

3 0
3 years ago
What is .6667 as a fraction? in simplest form?
ss7ja [257]
It would be 2/3 because 2 divided by 3 on a calculator is .6667
8 0
3 years ago
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