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Maurinko [17]
3 years ago
10

A combination lock requires a user to select three numbers to unlock it, where all three numbers are between 1 to 30, inclusive,

and numbers can be used more than once. What is the probability someone can guess the correct combination given 100 attempts?
Mathematics
1 answer:
Sonbull [250]3 years ago
5 0

Answer:

\frac{1}{270}=0.00370

Step-by-step explanation:

As the numbers are only between 1 and 30

Total number of possible combinations = 30×30×30 = 27000

If there are 100 attempts then

\text{P (someone guesses correct)}=\frac{\text{Number of attempts}}{\text{Total number of possible combinations}}\\\Rightarrow \text{P (someone guesses correct)}=\frac{100}{27000}\\\Rightarrow \text{P (someone guesses correct)}=\frac{1}{270}=0.00370

∴ Probability someone can guess the correct combination given 100 attempts is \mathbf{\frac{1}{270}=0.00370}

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notka56 [123]

Answer:

Portion of walking in degrees = 72°

Step-by-step explanation:

The question is incomplete as the diagram is not shown in the question. I have attached the full question below. Consult it to understand the solution better

First calculate the percentage of walking from a total of all activities.

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Percentage of walking = 20%

It means the portion of the circle(pie chart) for walking should be equal to 20% of the whole circle.

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Portion of walking in degrees = 20/100 · 360°

Portion of walking in degrees = 72°

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3 years ago
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Yakvenalex [24]

Answer:

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Step-by-step explanation

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Read 2 more answers
Helen had Php7500 for shopping money. When she got home, she had Php132.75 in her pocket. How much did she spend for shopping?
Nataly_w [17]

Answer:

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