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3 years ago

How many nickels have the same value as a half dollar.?

1 answer:

8 0

A nickel has the monetary worth of $0.05
A half-dollar has the monetary worth of $0.50

0.50/0.05 = 10

you will need 10 nickels to have the same monetary worth as a half dollar

hope this helps

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In a group140 pupils 5/7 like swimming while the rest like football .find the fraction of the pupils who like football

ratelena [41]

Answer:

${ \sf{ \underline{it \: is \: \frac{2}{7} }}}$

Step-by-step explanation:

$= \frac{7}{7} - \frac{5}{7} \\ \\ = \frac{2}{7}$

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3 years ago

A variation on a familiar theme: A packet is received correctly by an end user with probability p. To increase the likelihood th

Leya [2.2K]

Answer:

a) X can take the values {0,1,2,3,...,n}

The probability mass function of x is defined for k copies received correctly as:

$P(X=k)=\dbinom{n}{k}p^k(1-p)^{n-k}$

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Step-by-step explanation:

The variable X:number of copies received correctly by the end user can be modeled as a binomial variable, as it is a sum of n Bernoulli variables with probability p.

X can take the values {0,1,2,3,...,n}

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being p: the probability that a packet is received correctly by an end user, and q=1-p: the probability that a packet is not received correctly by an end user.

b) We have to calculate n so as to have a probability P(x≥1)=0.99, when p=0.9.

$P(x\geq1)=1-P(x=0)=0.99\\\\\\P(x=0)=\dbinom{n}{0}p^0(1-p)^n=1*1*(1-p)^n=(1-0.9)^n=0.1^n\\\\\\P(x\geq1)=1-0.1^n=0.99\\\\0.1^n=1-0.99=0.01\\\\n\cdot ln(0.1)=ln(0.01)\\\\n=ln(0.01)/ln(0.1)=2$

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3 years ago

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3 years ago

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Answer:

Step-by-step explanation:

the explanation is in the picture

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3 years ago

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fredd [130]

Answer:

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