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2 years ago

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4 a) Sebuah sekolah mengadakan lawatan sambil belajar ke Kuala Lumpur dengan membawa 44 orang penumpang termasuk seorang guru le

laki dan 3 orang guru perempuan. Diberi 2/5 daripada bakinya adalah murid lelaki. i. Berapakah bilangan murid perempuan yang menyertai lawatan itu?

1 answer:

ratelena [41]2 years ago

5 0

Harap ini menolongmu :)

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In a game, there are 12 identical balls of which seven are red and five are green.

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3 years ago

Fine line trucks rents an 18-ft truck for $42 plus 35 cents per mile. Judy needs a truck for one day to deliver a shipment of pl

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Set it up as an equation:
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2 years ago

Suppose that the pH of soil samples taken from a certain geographic region is normally distributed with a mean pH of 7 and a sta

Otrada [13]

Answer:

a) P=0

b) P=1

c) P=0

d) X=7.1645

Step-by-step explanation:

We have the pH of soil for some region being normally distributed, with mean = 7 and standard deviation of 0.10.

a) What is the probability that the resulting pH is between 5.90 and 6.15?

We calculate the z-score for this 2 values, and then compute the probability.

$z_1=(X_1-\mu)/\sigma=(5.9-7.0)/0.1=-11\\\\z_2=(X_2-\mu)/\sigma=(6.15-7)/0.1=-8.5$

Then the probability is

$P(5.90$

b) What is the probability that the resulting pH exceeds 6.10?

We repeat the previous procedure.

$z=(6.10-7)/0.1=-9\\\\P(x>6.1)=P(z>-9)=1$

c) What is the probability that the resulting pH is at most 5.95?

$z=(5.95-7)/0.1=-10.5\\\\P(x$

d. What value will be exceeded by only 5% of all such pH values?

We have to calculate the value of pH for which only 5% is expected to be higher. This can be represented as P(X>x)=0.05.

In the standard normal distribution, it happens for a z=1.645.

$P(z>1.645)=0.05$

Then, we can calculate the pH as:

$x=\mu+z\sigma=7.0+1.645*0.1=7.0+0.1645=7.1645$

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3 years ago

A right triangle has an hypotenuse of 155 centimeters and a leg of 124 centimeters. Which of these is the length of the other le

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It is the square root of 155^2-124^2 according to Pythagorean's theorem, which is equal to 97, so it is B.

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3 years ago

Read 2 more answers

Help this is my first time on this app I want to see if it works could someone Awnser my question please !

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Answer:

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3 years ago