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Nata [24]
3 years ago
13

Out of 120 students in exam, 2/3 of them passed. How many students passed?​

Mathematics
2 answers:
LenKa [72]3 years ago
8 0

Out of 120 students in exam, 2/3 of them passed. How many students passed?

now,

no of students passed = 2/3×120

= 0.66×120

=80...

therefore <em>8</em><em>0</em><em> </em><em> </em><em>students</em><em> </em><em>were</em><em> </em><em>passed</em><em>.</em><em>.</em><em>.</em><em>.</em>

Alex Ar [27]3 years ago
8 0

Answer:

80

Step-by-step explanation:

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If there's a 9% tax, and the couch is $227.49 what will the total be?
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Answer

Step-by-step explanation:

227.49 x 1.09 = 247.96

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2 years ago
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If the level of significance of a hypothesis test is raised from 0.005 to 0.2, the probability of a type ii error will:_________
LiRa [457]

The probability of type II error will decrease if the level of significance of a hypothesis test is raised from 0.005 to 0.2.

<h3 /><h3>What is a type II error?</h3>

A type II error occurs when a false null hypothesis is not rejected or a true alternative hypothesis is mistakenly rejected.

It is denoted by 'β'. The power of the hypothesis is given by '1 - β'.

<h3>How the type II error is related to the significance level?</h3>

The relation between type II error and the significance level(α):

  • The higher values of significance level make it easier to reject the null hypothesis. So, the probability of type II error decreases.
  • The lower values of significance level make it fail to reject a false null hypothesis. So, the probability of type II error increases.
  • Thus, if the significance level increases, the type II error decreases and vice-versa.

From this, it is known that when the significance level of the given hypothesis test is raised from 0.005 to 0.2, the probability of type II error will decrease.

Learn more about type II error of a hypothesis test here:

brainly.com/question/15221256

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7 0
1 year ago
Simplify this expression
Fantom [35]

Answer:

{3}^{ - 3}  =  ({ \frac{1}{3} )}^{3}  =  \frac{1}{27}

8 0
3 years ago
Ben bought a Rolex for $150,000 with a 100%<br> markup, how much will it cost?
FromTheMoon [43]

Answer:

300,000$

Step-by-step explanation

<h3>♣ Formulate:</h3>

Based on the given conditions,

formulate:

150,000 x (100% + 100%)

•••••••••••••••••••••••••••••••••

<h3>♠ Calculate</h3>

150,000 x (1 + 1)

= 150,000 x 2

= 300,000

{ Alternative Forms: 3 x 10⁵ }

Answer:

Ben bought a Rolex for $150,000 with a 100% markup, It will cost 300,000$

•♣••♠••♣••♠••♣••♠••♣••♠••♣•

3 0
2 years ago
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