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Marina CMI [18]
3 years ago
9

Ten of 16 students in Nyack's class are girls. His teacher selected two helpers by randomly drawing names. He drew a boys name f

irst and then a girls names. Nyack thinks that the probability of this happening is 15/64. Is he correct? If not, Explain his error.
Mathematics
1 answer:
katrin [286]3 years ago
7 0

|\Omega|=16\cdot15=240\\|A|=6\cdot10=60\\\\P(A)=\dfrac{60}{240}=\dfrac{1}{4}

He's wrong.

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Step-by-step explanation:

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What is the slope intercept form of the perpendicular line to the line with (-2,7), (0,1) and (2,-5) points
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Answer:

Step-by-step explanation:

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Slope-intercept equation for line of slope ⅓ and y-intercept 1:

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In Δ A B C, the measure of the largest angle is 32 less than 3 times the smallest angle. The measure of the middle angle is 8 mo
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Answer:

52degrees

Step-by-step explanation:

Let the measure of the largest angle be x

middle angle be y

smallest angle be z

Since the sum of angle in a triangle is 180 degrees, hence;

x + y + z = 180 .... 1

If the measure of the largest angle is 32 less than 3 times the smallest angle, then;

x = 3z - 32

3z = x+ 32

z = x+32/3 ..... 2

If he measure of the middle angle is 8 more than half the measure of the largest angle, then;

y = x/2 + 8 .... 3

Substitute 2 and 3 into 1;

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multiply through by 6

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11x = 1080-112

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Get the middle angle y;

Since y = x/2 + 8

y = 88/2 + 8

y = 44 + 8

y = 52 degrees

Hence the measure of the middle angle is 52degrees

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