Eli, Freda and Geoff were given ?800 to share in the ratio of their ages. Eli is 9 years old,Feda is 13 years old and Geoff is 1
2 answers:
Answer:
Share of Eli, Freda and Geoff will be $180, $260, $360 respectively.
Step-by-step explanation:
Eli, Freda and Geoff were given $800 to share in the ratio of their age.
Their ages were 9 years, 13 years and 18 years respectively.
Ratio of their ages will be 9 : 13 : 18
Now share of Eli will be =
=
= $180
Share of Freda will be =
= $260
Share of Geoff will be =
= $360
Therefore, share of Eli, Freda and Geoff will be $180, $260, $360 respectively.
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Answer:
Let X the random variable of interest "number of tweets with no reaction", on this case we now that:
And the expected value is given by:
So we expect about 71 tweets with no reaction for this case.
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:
Where (nCx) means combinatory and it's given by this formula:
Solution to the problem
Let X the random variable of interest "number of tweets with no reaction", on this case we now that:
And the expected value is given by:
So we expect about 71 tweets with no reaction for this case.