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Pie
1 year ago
15

In a two-digit number, the units digit is 5 more than the tens digit. The number itself is three times the sum of its digits. Wh

at is this number?
Mathematics
1 answer:
Alenkasestr [34]1 year ago
7 0

Answer:

The number is 27.

Step-by-step explanation:

Since the units digit has to be 5 more than the tens digit, there are only four possible two-digit numbers which satisfy this condition. They are 16, 27, 38, and 49.

Next, the digits can be added and multiplied by three to check that the answer is the same two-digit number.

3 (1 + 6) = 21 does not work because 16 isn't the same as 21.

3 (2 + 7) = 27 does work because 3 * 9 is 27.

3 (3 + 8) = 33

3 (4 + 9) = 39

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A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 1
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The probability that the mean clock life would differ from the population mean by greater than 12.5 years is 98.30%.

Given mean of 14 years, variance of 25 and sample size is 50.

We have to calculate the probability that the mean clock life would differ from the population mean by greater than 1.5 years.

μ=14,

σ=\sqrt{25}=5

n=50

s orσ =5/\sqrt{50}=0.7071.

This is 1 subtracted by the  p value of z when X=12.5.

So,

z=X-μ/σ

=12.5-14/0.7071

=-2.12

P value=0.0170

1-0.0170=0.9830

=98.30%

Hence the probability that the mean clock life would differ from the population mean by greater than 1.5 years is 98.30%.

Learn more about probability at brainly.com/question/24756209

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There is a mistake in question and correct question is as under:

What is the probability that the mean clock life would differ from the population mean by greater than 12.5 years?

5 0
2 years ago
For any parallelogram what is not always true
tresset_1 [31]

Answer:

The diagonals are congruent.

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Ten is not equal to six divided by three
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I didn't really know whatnu were asking so i took a guess..sorey if i didn't help

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3 years ago
13x - 6 = 8x + 19 solve for x
klio [65]
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5 is the answer
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2 years ago
Read 2 more answers
How to solve this problem?
faust18 [17]
54 = 27 x 2. Third root of 27 = 3 because 3 x 3 x 3 =2. So you get 3root2
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3 years ago
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