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3 years ago

Math test scores:

Mathematics

2 answers:

den301095 [7]3 years ago

4 0

mean is 86 , median is 85 and mode is 93 , range is 10

Alinara [238K]3 years ago

3 0

Answer:

Mean: 87.5

Mode: NO mode

Median: 88

Hope this helps!!!!! :)

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A bowl contains 8 chips: 4 blue and 4 red. Three chips are drawn at random and without replacement from a bowl. What is the prob

PIT_PIT [208]

Answer:

the probability that 3 blue chips ( or red chips) are chosen is P(X=3) = 1/14

Step-by-step explanation:

Since the X= choosing x blue chips, then P(X) follows an hypergeometric distribution , when sampling is done without replacement

P(X=x) = (C,x) * (N-C , n-x) /( N ,n)

where ( ) represents combinations then

N= population size = 8 chips

n = sample size = 3 chips

C = number of blue chips = 4 chips

x= number of blue chips that are chosen = 3 blue chips

replacing values

P(X=3) = (4,3) * (8-4 , 3-3) /( 8 ,3) = (4,3) * (4 , 0 ) /( 8 ,3) = 4 * 1 / [ 8!/(3!*5!) ] =

4*3!*5! /8! = 1/14

P(X=3) = 1/14

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3 years ago

Which relation is a function?

fomenos

Answer:

Step-by-step explanation:

solution is A.

A relation is a function if no x value gives two or more values of y though different values of x may give same value of y.

5 0

4 years ago

Calculate the HCF of 8a³-27, 4a²-9 and 4a²-12a+9

Lyrx [107]

$\: \: \: \: \:$

first add

(3a²-5a+5)+(a³-5a²+8)

=3a²-5a+5+a³-5a²+8

=a³-2a3a²-5a²+5+8

=a³-2a²+13

and now,

substract a³-2a²+13 from a²-4a²-9

=7a²-4a²-9-(a³+13)

=7a²-4a²-9-a³+2a²-13

= a³+7a²-4a²+2a²-9-13

=-a³+5a²-22

<h2><u>hope</u><u> it</u><u> helps</u></h2>

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3 years ago

Simplify the expression: (cosx-1)/sinx + sinx/(cosx +1) ?? I got cosx but the answer is zero?? Je ne sais quoi!!! Btw the questi

Radda [10]

<span> (cosx-1)/sinx + sinx/(cosx +1) =?

$\it E = \dfrac{\cos x-1}{\sin x} + \dfrac{\sin x}{\cos x+1} = \dfrac{(\cos x-1)(\cos x+1)+sin^2x}{sin x(\cos x+1)}= 
\\\;\\ \\\;\\
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4 years ago

Which term describes the distance from the center of a circle to any point on the circle?

GalinKa [24]

Answer:

Radius

Step-by-step explanation:

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