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4 years ago

Four students made statements about a tennis ball they were using in a lab. Which student made a mistake in her statement?

Mathematics

2 answers:

nalin [4]4 years ago

5 0

Answer:

the answer is B.) Julia

Step-by-step explanation:

raketka [301]4 years ago

5 0

Answer:

Im gonna go with B i hope that i helped with your question

Step-by-step explanation:

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I roll a fair die twice and obtain two numbers X1= result of the first roll and X2= result of the second roll. Given that I know

azamat

By definition of conditional probability,

$P(X_1=4\text{ or }X_2=4\mid X_1+X_2=7)=\dfrac{P((X_1=4\text{ or }X_2=4)\text{ and }X_1+X_2=7)}{P(X_1+X_2=7)}$

$=\dfrac{P((X_1=4\text{ and }X_1+X_2=7)\text{ or }(X_2=4\text{ and }X_1+X_2=7))}{P(X_1+X_2=7)}$

Assuming a standard 6-sided fair die,

if $X_1=4$ , then $X_1+X_2=7$ means $X_2=3$ ; otherwise,
if $X_2=4$ , then $X_1=3$ .

Both outcomes are mutually exclusive with probability $\frac1{36}$ each, hence total probability $\frac2{36}=\frac1{18}$ .

Of the 36 possible outcomes, there are 6 ways to sum the integers 1-6 to get 7:

(1, 6), (2, 5), (3, 4), (4, 3), (5, 2), (6, 1)

and so a sum of 7 occurs $\frac6{36}=\frac16$ of the time.

Then the probability we want is

$P(X_1=4\text{ or }X_2=4\mid X_1+X_2=7)=\dfrac{\frac1{18}}{\frac16}=\frac13$

6 0

3 years ago

Determine the domain

Aleonysh [2.5K]

Answer:

Step-by-step explanation:

3 0

3 years ago

Diouna has $35,000 worth of rental car insurance. She rented a Lexus over the weekend and got into a car accident causing the ca

Dimas [21]

Answer:

she will be responsible with a big bill to pay that's for sure

3 0

3 years ago

Simplify. -2(3)2 - 8 ÷ 2 + 6

drek231 [11]

2(3)2 - 8 ÷ 2 + 6
(6) 2 - 8 ÷ 2 + 6
12 - 8 ÷ 2 + 6
12 - 4 + 6
8 + 6
14

6 0

3 years ago

The length of a side of a regular pentagon is f + 12.

alexandr1967 [171]

Answer:

5f+60

Step-by-step explanation:

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3 years ago

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