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3 years ago

13

Niran has attended a local amusement park twice every year since he was five years old How old is niran if he has been to the am

usement park 20 times

1 answer:

Troyanec [42]3 years ago

3 0

Answer:

poop

Step-by-step explanation:

pee

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A Department of Transportation survey showed that 60% of U.S. residents over 65 years of age oppose use of cell phones in flight

Shalnov [3]

Answer:

a) $P(X=12)=(25C12)(0.6)^{12} (1-0.6)^{25-12}=0.0760$

b) $P(X>17) = P(X=18) +....+P(X=25)$

And we can use the following excel code: "=1-BINOM.DIST(17;25,0.6,TRUE)"

And we got:

$P(X>17) = P(X=18) +....+P(X=25)= 0.154$

c) $P(X$

And using the following excel code we got: "=BINOM.DIST(7,25,0.6,TRUE)"

And we got:

$P(X$

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: $P(A)+P(A') =1$

Solution to the problem

Part a

$P(X=12)=(25C12)(0.6)^{12} (1-0.6)^{25-12}=0.0760$

Part b

For this case we want this probability:

$P(X>17) = P(X=18) +....+P(X=25)$

And we can use the following excel code: "=1-BINOM.DIST(17,25,0.6,TRUE)"

And we got:

$P(X>17) = P(X=18) +....+P(X=25)= 0.154$

Part c

For this case we want this probability:

$P(X$

And using the following excel code we got: "=BINOM.DIST(7,25,0.6,TRUE)"

And we got:

$P(X$

4 0

3 years ago

How to find area of a circle.

hjlf

Answer:

A rea of a Circle = π × r²

Step-by-step explanation:

The area of a circle formula is A = π × r² where r is the radius.

Remember that the radius might not be given but the radius is half of the diameter.

For π use the calculator value or use 3.14.

8 0

3 years ago

A groundskeeper needs grass seed to cover a circular field, 290 feet in diameter.

Alchen [17]

Answer:

66018.5 sq feet

Step-by-step explanation:

Area = πr²

To find the Radius R we need Diameter which 290 fee so:

R = Diameter / 2

R = 290/2

R = 145 ft

Now put values in Area Formula

Area = 3.14 x (145)^2

A = 66018.5 sq feet

4 0

3 years ago

Plz help me out !!! I rlly need u guys to help

expeople1 [14]

Answer1: for every 5 kids there are 9 parents

2 part a: the for every 4 cookies for every 9 sodas that are sold

2 part b:the ratio of cookies to soda is 9:4

3.the ratio of pencils to erasers is 15:7

3: for every 15 pencils there are 7 erasers.

4.The first blank is 2eyes there Are4 legs

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Pls help I’ll brainlest and add extra points

Inessa05 [86]

Answer:

11) m<8

12) a<-64

13) f<140

14) t> or equal to 150

15) g<-18

16) y< or equal to -16

17) a> or equal to 16

Step-by-step explanation:

hope this helps

4 0

3 years ago