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Leni [432]
3 years ago
14

A number is selected at random from the numbers 1,4,9,16 and another number y from 1,2,3,4 find the probability that the value o

f xy is more than 16
Mathematics
2 answers:
svetoff [14.1K]3 years ago
8 0
It have to be 6/8 or 3/4 cause all of them are over 16
kirill [66]3 years ago
5 0

Lets draw a sample space of the possible outcomes of xy-

S= (1, 2, 3, 4, 4, 8, 12, 16, 9, 18, 27, 36, 16, 32, 48, 64)

Total no. of outcomes= 4*4= 16

No. of outcomes greater than than 16= 6

So; Probability of xy>16 = 6/16 = 3/8

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A store manager combines 2 lb of trail mix that contains some cashew nuts with 30 lb
bekas [8.4K]

Answer:

100%

Step-by-step explanation:

Let  p = percent of cashews in first mix

2p = lb. of cashews in first mix

30(.20) =  6 = lb. of cashews in second mix

32(.25) =  8 = lb. of cashews in the combined mix

So,

lb. of cashews in first mix +  lb. of cashews in second mix = lb. of cashews in the combined mix

2p + 6 = 8

2p = 2

p = 1 = 100%

7 0
3 years ago
Read 2 more answers
According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 20
Murljashka [212]

Answer:

There is not enough evidence to support the claim that Alaska had a lower proportion of identity theft than 23%.  

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 1432

p = 23% = 0.23

Alpha, α = 0.05

Number of theft complaints , x = 321

First, we design the null and the alternate hypothesis  

H_{0}: p = 0.23\\H_A: p < 0.23

This is a one-tailed test.  

Formula:

\hat{p} = \dfrac{x}{n} = \dfrac{321}{1432} =0.2241

z = \dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

Putting the values, we get,

z = \displaystyle\frac{0.2241-0.23}{\sqrt{\frac{0.23(1-0.23)}{1432}}} = -0.5305

Now, we calculate the p-value from the table.

P-value = 0.298

Since the p-value is greater than the significance level, we fail to reject the null hypothesis and accept the null hypothesis.

Conclusion:

Thus, there is not enough evidence to support the claim that Alaska had a lower proportion of identity theft than 23%.

5 0
3 years ago
Liz buys 6 flowerpots. there are 8 flowers in each pot. how many flowers did Liz buy?
vivado [14]

Answer:

48

Step-by-step explanation:

6 flowerpots

8 flowers per pot

8 x 6 = 48 flowers

4 0
3 years ago
Systematic random sampling is used to interveiw residents in 25% of 80 apartments in a building. The sampling interval would be
DedPeter [7]

The answer is A, A is the answer

8 0
3 years ago
What is the value of the expression when n=3 -2(5+n-8-3n)
Greeley [361]
-2n(5 + n - 8 - 3n)
-10n - 2n² + 16n + 6n²
4n² + 6n
7 0
3 years ago
Read 2 more answers
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