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3 years ago

If x represents a number,does 2/5 .x always represent 40% of the number

Mathematics

2 answers:

VashaNatasha [74]3 years ago

8 0

Answer:

jskslfbdns sjskkdkdbsbs

Step-by-step explanation:

idk really sorry sksksj lols jsjsjsm

marissa [1.9K]3 years ago

6 0

Answer:

Yes

Step-by-step explanation:

because it is multiplied by 0.4 and you can try placing two diffrent numbers and it will represent 40% of the placed number.

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When throwing fair dice, all six faces of each die are equally likely. there are thirty-six total possible outcomes (any of the

Marysya12 [62]

Answer:

Probability of sum of pips on two faces is at least 9 = $\frac{5}{18}$

Step-by-step explanation:

Experiment: Throwing two fair dice.

Total no of Outcome = $6^2$ = 36

Sample space (list of outcome) is attached.

Let E be the event that sum of pips on two faces is at least 9.

$Probability \:(\,Event \:E\,)\: =\;\frac{No.\: of\: favorable\: outcome\:of\: Event\: E}{Total\: No.\: of \:Outcome}$

Favorable outcome are where sum is 9 , 10 , 11 and 12.

From Sample space, No. of Favorable outcome = 10

∴ $Prob\: (\: E\: ) = \frac{10}{36}$

$Prob\: (\: E\: ) = \frac{5}{18}$

6 0

3 years ago

A certain bacteria culture grows at a rate if 18% everday. There are currently 420 bacteria. How many bacteria will there be on

Anettt [7]

Answer:

1579

Step-by-step explanation:

There is a particular formula you must use and it leads to this 420(1 + 0.18)^8=1579

6 0

2 years ago

Pls answer ;-;

Svetach [21]

Answer:

The second one (2) is a lie

Step-by-step explanation:

The quantities are all proportional, with 4 donuts costing one dollar being consistant. With this, we can multiply the amount of donuts to 40, and through what we know, we can find that the donuts will cost 10 dollars. This leaves only (2) left.

6 0

2 years ago

Read 2 more answers

Which of the following functions is graphed below?

dalvyx [7]

Hmmm I think either D or C

6 0

3 years ago

Read 2 more answers

Use the fact that the mean of a geometric distribution is μ= 1 p and the variance is σ2= q p2. A daily number lottery chooses th

butalik [34]

Answer:

a). The mean = 1000

The variance = 999,000

The standard deviation = 999.4999

b). 1000 times , loss

Step-by-step explanation:

The mean of geometric distribution is given as , $\mu = \frac{1}{p}$

And the variance is given by, $\sigma ^2=\frac{q}{p^2}$

Given : $p=\frac{1}{1000}$

= 0.001

The formulae of mean and variance are :

$\mu = \frac{1}{p}$

$\sigma ^2=\frac{q}{p^2}$

$\sigma ^2=\frac{1-p}{p^2}$

a). Mean = $\mu = \frac{1}{p}$

= $\mu = \frac{1}{0.001}$

= 1000

Variance = $\sigma ^2=\frac{1-p}{p^2}$

= $\sigma ^2=\frac{1-0.001}{0.001^2}$

= 999,000

The standard deviation is determined by the root of the variance.

$\sigma = \sqrt{\sigma^2}$

= $\sqrt{999,000}$ = 999.4999

b). We expect to have play lottery 1000 times to win, because the mean in part (a) is 1000.

When we win the profit is 500 - 1 = 499

When we lose, the profit is -1

Expected value of the mean μ is the summation of a product of each of the possibility x with the probability P(x).

$\mu=\Sigma\ x\ P(x)= 499 \times 0.001+(-1) \times (1-0.001)$

= $ 0.50

Since the answer is negative, we are expected to make a loss.

4 0

2 years ago