Friday

July 25, 2014

July 25, 2014

Posted by **Brittany** on Sunday, February 5, 2012 at 5:58pm.

a) On average, how many of the 20 individuals would be 80 years old or older?

E(x)=np= 20*0.055= 1.1

is this corrected?

b)What is the probability that less than 2 of the 20 individuals are 80 years old or older?

P(x<2)=P(x=0)+P(x=1)= 0.6980679

is this corrected?

- statistics -
**MathGuru**, Sunday, February 5, 2012 at 6:36pmLooks good to me! Good job!

**Related Questions**

government - According to the age-cohort tendency, significant changes in the ...

college math - Aging in the United States In 2050, about 1 over 5 of the ...

Statistics - A Gallup Poll reported the percentage of Americans who approve of ...

math - need step by step on how you get the answer Aging in the United States In...

Statistics - Suppose that, in fact, the blood cholesterol level of all men aged ...

math - i posted this yesterday and never recieved a answer i do really neeed ...

Statistics - (1) Gluten sensitivity, which is also known as wheat intolerance, ...

statistics - many states are considering steps that would help them collect ...

alegbra - About one fifth of the adult population in the United States smoked in...

math statistics - The average price of a gallon of unleaded regular gasoline was...