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Katen [24]
3 years ago
8

According to a​ study, one dash fifth of all rough diamonds produced in one region are blood diamonds.​ Also, 88​% of the​ regio

n's rough diamonds are processed in City​ X, and of these​ diamonds, one dash fourth are blood diamonds. a. Find the probability that a rough diamond produced in this region is not a blood diamond. b. Find the probability that a rough diamond is processed in City X and is a blood diamond.
Mathematics
1 answer:
Alchen [17]3 years ago
6 0

Answer

a) 4:5 = 0,8 = 80%

b) 88% . 25% = 22%

Step-by-step explanation:

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The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t
Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

Average = \frac{x + y}{2}

And:

Average = (1 - 30\%) * x -----30% less than x

Substitute Average = (1 - 30\%) * x in Average = \frac{x + y}{2}

\frac{x + y}{2} = (1 - 30\%) * x

\frac{x + y}{2} = (1 - 0.30) * x

\frac{x + y}{2} = 0.70 * x

\frac{x + y}{2} = 0.70x

Cross multiply

x + y = 0.70x * 2

x + y = 1.40x

Collect like terms

1.40x - x = y

0.40x = y

Make x the subject

x = \frac{y}{0.40}

x = 2.50y

So, the average is:

Average = (1 - 30\%) * x

Average = (1 - 30\%) * 2.50y

Average =0.70 * 2.50y

Average =1.75y

Rewrite as:

Average =(1 + 0.75)y

Express as percentage

Average =(1 + 75\%)y

This means that the average is 75% bigger than the second number

6 0
2 years ago
Is 0.625 greater than 0.75
adell [148]

Answer:

no

Step-by-step explanation:

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HELP NEEDED ASAP I’m gonna fail math if I don’t get help lol
sergiy2304 [10]

Answer:

I think that -0.0000002 is the least, but I don't know the rest. I hope you can find the rest though. Happy Holidays!

Step-by-step explanation:

3 0
2 years ago
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Answer:

y=1/2x+3

Step-by-step explanation:

So the slope formula is y=mx+b. Where mx is the slope and b is the y-intercept. In this case our slope is 1/2 because we rise by one unit and run by 2 units. The y-intercept in this case is 3 because on the y axis the line intersects over 3.

Hopefully that helped :).

3 0
2 years ago
The sales tax on a used car is​ $168168​, and the sales tax rate is 55​%. Find the purchase price ​(the price before taxes are​
Naily [24]

Answer:

$92492.40

Step-by-step explanation:

168168.00 - 55% (75675.60)= $92492.40

7 0
3 years ago
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