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Zielflug [23.3K]

3 years ago

7

Help me solve and explain this

1 answer:

g100num [7]3 years ago

7 0

Answer:

B because the length of R to U is 6x5

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g An urn contains 10 balls: 4 red and 6 blue. A second urn contains 16 red balls and an unknown number of blue balls. A single b

Fed [463]

Answer:

Therefore the of blue in the second urn is 4.

Step-by-step explanation:

Let second urn contain x number of blue ball .

Urn Red Ball Blue Ball Total Ball

1 4 6 10

2 16 x 16+x

Getting a red ball from first urn is $P(R_1)=\frac{\textrm {Number of red ball}}{\textrm {Total ball}}$ $=\frac{4}{10}$

Getting a blue ball from first urn is $P(B_1)=\frac{\textrm {Number of blue ball}}{\textrm {Total ball}}$ $=\frac {6}{10}$

Getting a red ball from second urn is $P(R_2)=\frac{\textrm {Number of red ball}}{\textrm {Total ball}}$ $=\frac{16}{16+x}$

Getting a blue ball from second urn is $P(B_2)=\frac{\textrm {Number of blue ball}}{\textrm {Total ball}}$ $=\frac {x}{16+x}$

Getting two red balls from first and second urn is $=\frac{4}{10}\times \frac{16}{16+x}$

$=\frac{32}{5(16+x)}$

Getting two blue balls from first and second urn is $=\frac{6}{10}\times \frac{x}{16+x}$

$=\frac{3x}{5(16+x)}$

The probability that both balls are the same in color is $=\frac{32}{5(16+x)}+\frac{3x}{5(16+x)}$

Given that the probability that both balls are the same in color is 0.44.

According to the problem,

$\frac{32}{5(16+x)}+\frac{3x}{5(16+x)}=0.44$

$\Rightarrow \frac{32+3x}{5(16+x)} =0.44$

$\Rightarrow \frac {32+3x}{(80+5x)} =0.44$

$\Rightarrow 32+3x =0.44(80+5x)$

$\Rightarrow 32+3x =35.2 +2.2x$

$\Rightarrow 3x -2.2 x= 35.2 -32$

$\Rightarrow 0.8x= 3.2$

$\Rightarrow x = 4$

Therefore the of blue in the second urn is 4.

5 0

3 years ago

The body of a person who weighs 50 kilograms contains around 2 × 10^2 grams of sodium chloride. How much sodium chloride is cont

Aleksandr [31]

Answer:

Answer is A. $3.6*10^{5}$

Step-by-step explanation:

Mass of Sodium Chloride in one 50kg person = $2*10^{2}$ grams

Mass of Sodium Chloride in $1.8*10^{3}$ 50kg people = $2*10^{2}$ * $1.8*10^{3}$

= $(1.8*10^{3})*(2*10^{2})$

= $3.6*10^{5}$

So the Answer is A.

8 0

4 years ago

5(x+9) distribute five time x plus nine...........???

Tema [17]

Using distributive property, it would become 14x.

5 0

3 years ago

Read 2 more answers

7. Maria quiere agrandar la foto de su

lukranit [14]

Answer:

the perimeter is 960

Step-by-step explanation:

The computation of the perimeter is shown below;

If we assume

= (24 × 2) + (6 × 2)

= 48 + 12

= 60

And, the area is 16 times to that of original So

= 60 × 16

Hence, the perimeter is 960

7 0

3 years ago

There were 32 skaters at the rink on Friday. On Saturday, there were 27 skaters at the

shtirl [24]

Answer: 32 + 27 = 59

Step-by-step explanation:

5 0

3 years ago