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3 years ago

HELP i need help, for apëx

Mathematics

1 answer:

Luda [366]3 years ago

5 0

Answer:

123

Step-by-step explanation:

b.2+7

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A teacher has found that the probability that a student studies for a test is 0.610.61, and the probability that a student gets

Ann [662]

Answer with step-by-step explanation:

Let

A=Student studies for a test

B=Student gets good grade on a test

The probability that a student studies for a test=P(A)=0.61

The probability that a student gets a good grade on a test=P(B)=0.79

The probability that both occur= $P(A\cap B)=0.56$

a.We have to find the events are independent

We know that if two events A and B are independent then

$P(A)\cdot P(B)=P(A\cap B)$

$P(A)\cdot P(B)=0.61\times 0.79=0.4819$

$P(A\cap B)\neq P(A)\cdot P(B)$

Hence, given events are not independent.

b.We have to find $P(B/A)$

$P(B/A)=\frac{P(A\cap B)}{P(A)}$

$P(B/A)=\frac{0.56}{0.61}=0.92$

c. We have to find $P(A/B)$

$P(A/B)=\frac{P(A\cap B}{P(B)}$

$P(A/B)=\frac{0.56}{0.79}=0.71$

7 0

3 years ago

Bryce wrote a six-page essay for his English class. It took him 2.5 hours to write the essay. How many minutes did he average pe

erastovalidia [21]

The average per page will be given by:
(number of pages)/(time)
number of pages=6 pages
time=2.5 hours
thus
average=(6/2.5)=2.4 pages per hour
The answer is: 2.4 pages per hour

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3 years ago

Students collected 600 cans for the canned food drive.

BartSMP [9]

Answer:

they'll need 200 more cans

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3 years ago

PLEASE!!! I'LL GIVE YOU MY HOUSE IF YOU CAN ANSWER THIS!!! PLUS BRAINLIEST ANSWER! Y= 1\2x-2. COMPLETE THE ORDERED PAIRS (2,_) (

Reptile [31]

Plug each x-value into the equation to get the y-value:

$\frac{1}{2} (2)-2=1-2=-1$

(2,-1)

$\frac{1}{2} (0)-2=0-2=-2$

(0,-2)

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2 years ago

PLEASE PELASE PLEASE HELP ME

V125BC [204]

Answer:

In ∆ABC AND ∆DEF

ABC=DEF...........each 90°

SIDE AB =SIDE ED...........given

SIDE BC =SIDE EF............B-F-C and E-C-F

∆ABC =∆DEF....................by SAS test

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2 years ago