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3 years ago

In a survey, 27% of the people chose salads over a meat dish. In all 81 people chose salads. How many people were in the survey

Mathematics

1 answer:

oksian1 [2.3K]3 years ago

8 0

Answer:300

Step-by-step explanation:

81/x=27/100 and solve for x

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Diego estimated that he has 200 rocks in his collection. He counted them and he has 160 rocks. What is his percent error?

nexus9112 [7]

Answer:

80%

Step-by-step explanation:

160 of 200

160/200=0.8

move the decimal point over to the right 2 times

then u have 0.80

80%

8 0

3 years ago

Suppose you just received a shipment of twelve televisions. Three of the televisions are defective. If two televisions are rando

qwelly [4]

Answer: The probability that both televisions work is 0.5625 .

The probability at least one of the two televisions does not work is 0.4375.

Step-by-step explanation:

Given : Number of televisions received in shipment= 12

Number of defective televisions received in shipment= 3

Then proportion of defective televisions = $\dfrac{3}{12}=0.25$

Using binomial probability formula, the probability of getting success in x trials is given by :-

$P(x)=^nC_xp^x(1-p)^{n-x}$

If two televisions are randomly selected, then the probability that both televisions work will be :-

$P(0)=^2C_0(0.25)^0(0.75)^2=(0.75)^2=0.5625$

The probability at least one of the two televisions does not work will be :-

$P(x\geq1)=1-P(0)=1-0.5625=0.4375$

6 0

2 years ago

How can you find 75% of any number?

Aleks04 [339]

Answer:

Step-by-step explanation:

Multiply it by 0.75, or find 3/4 of that number. Whichever you prefer! The first one always works though the second one sometimes does but sometimes 3/4 of the number isn't that obvious.

5 0

3 years ago

Read 2 more answers

A demand function often expresses the price at which x items can be sold. Typically, the lower the price is, the more items ther

balu736 [363]

I would start at 2000 because of 400/.2 is 2000 idk sorry

5 0

3 years ago

Why is the answer 2 in the subtractive equation 1+1?

Yuki888 [10]

Answer:

That's not a subtractive equation, the symbol that you used indicates that it is an addition equation. if the question was 1-1 then the answer wouldn't be 2 but since the question is 1+1 the answer is 2

Step-by-step explanation:

6 0

2 years ago