All categories

3 years ago

PLEASE HELPPPPPPPPPPPPPPPPPPPPPPP

Mathematics

1 answer:

lara [203]3 years ago

4 0

$F=\{\ x\ |\ x$

F ∪ H is defined as the set that consists of all elements belonging to either set F or set H (or both).

F ∩ H is defined as the set composed of all elements that belong to both F and H

You might be interested in

Can anyone help me it 7 and 9 thank!

nalin [4]

The questions appear to be cut off in the image. If you could upload a different image I would love to help!

8 0

3 years ago

Write 0.8 as a fraction.

alekssr [168]

Answer:

8/10

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Suppose that 15% of people dont show up for a flight, and suppose that their decisions are independent. how many tickets can you

geniusboy [140]

Answer: 157 tickets

Explanation:

The people not showing up for the flight can be treated as from Binomial distribution.

The binomial distribution B(n, p) is approximately close to the normal i.e. N(np, np(1 − p)) for large 'n' and for 'p' and neither too close to 0 nor 1 .

Now, Let us assume 'n' = n

and we are given

p=0.15

So now B(n,0.15n) follows Normal distribution

u=n

$\sigma^{2}$ = 0.15n

We have to calculate P(X<144) with 99% accuracy

P(X<144) = P(Z<z)

where;

z= $(144-\bar{X})\div \sigma$

z score for 99% is 2.33

i.e.

$(144-\bar{X})\div \sigma = (144-n)/\sqrt{np} = 2.33\\\ (144-n)^{2} = \ np*2.33^{2}\\\ 20736 +n^{2} - 288n = 0.15n*5.43\\\ n^{2} - 288.81n + 20736=0$

solving this we will get one root nearly equal to 157 and other root as 133

Hence the answer is 157.

8 0

3 years ago

A group of 10 students participate in chess club, karate club, or neither.

Ira Lisetskai [31]

Answer: Option B

$P(A|B)=0.50$

Step-by-step explanation:

We look for the conditional probability of A given B.

This is written as:

$P(A|B) = \frac{P(A\ and\ B)}{P(B)}$

First we must find the probability of A and B

There are 10 students in total. Note that of those 10 students only 2 of them are at the same time in the karate club and in the chess club

Therefore:

$P(A\ and\ B)=\frac{2}{10}$

There are 10 students in total. Note that of those 10 students only 4 of them are in the chess club

Then:

$P(B)=\frac{4}{10}$

Finally:

$P(A|B) = \frac{P(0.2)}{0.4}=0.50$

5 0

4 years ago

A person invested $3,500 in an account growing at a rate allowing the money to double every 15 years. How long, to the nearest t

nignag [31]

Answer:

30 years and a half

Step-by-step explanation:

well let's just say 3.5k x hmm 2? at an estimate and that will get us to 7000.. so in order to get to 7000 we have to wait 15 years which is 30 years and a half. From Xthermyx. A brainly user.

8 0

3 years ago

Read 2 more answers