Answer:
about 41.67% are boys
Step-by-step explanation:
In terms of "ratio units", the fraction of students that are boys is ...
5/(5+7) = 5/12
As a percentage, that is ...
(5/12)·100% = 41 2/3%, about 41.67%
The percent of student that are boys is about 41.67%.
The required Poisson distribution used to model the elapsed time between the occurrence of successive events for a poisson random variable
<h3>How to find model of Poisson distribution?</h3>
We have to find distribution model used to model elapse the time between the occurrence of successive events for Poisson random variable.
<h3>According to given data in the question:</h3>
we know that, Poisson distribution
P(x=x) = e^-λ(λ)^x/x!
Time between succeess,
P(y>x) = e^-λy
and, P(y<x) = 1- e^-λy
They are exponential distribution.
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Answer:
25%.
Step-by-step explanation:
As a fraction it will be (50 - 40)/ 40 = 10/40 = 1/4.
% change 1/4 * 100 = 25%.
Answer:
Since the exponent of the scientific notation is negative, move the decimal point 3 places to the left.
0.003409
Note first that several months have 30 days (each): April, June and September.
(A) could not be correct, since the month in question could have 28, 29 or 31 days.
(B) See (A), above. If the month in question does not have 30 days, then the month could NOT be April, June or September. Reject (B).
(C) You do this one, similarly to my responses to (A) and (B), above.
(D) This one is true, since we know that June has 30 days. If the month in question does NOT have 30 days, then that month could not possibly be June.