Mariah has a spinner that has 10 equal sections, each containing a different number from 1 to 10. mariah determines abou
how many times the spinner will land on a number that is greater than 7 in 250 spins, and her work is shown below.
numbers greater than 7
p(number greater than 7) -
- nurnber of spins
total number of sections
4(250)
= 100
what mistake did mariah make, if any?
mariah has the formula reversed; it should be the total number of sections over the numbers greater than 7.
mariah should have used a 3 in the numerator because there are 3 numbers greater than 7.
mariah should multiply by the number of sections in the spinner rather than the total number of spins.
mariah calculated the prediction correctly and did not make any mistakes.

correct

step-by-step explanation:

step-by-step explanation:

i found the life tables for the year 2012. 

life table of males at age 30. probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old. 

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

                                          probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497