Sam added 6,152 and 379 and got the sum of 9,942. explain why sams addition is incorrect and find the sum of 6,152 + 379

Hello there!

Here we have the sum 6152 + 379.

We know that Sam find the solution 6152 + 379 = 9942

Here is clearly a mistake, you can see that the addition that sam did is 6152 + 3790 = 9942, so he started added the wrong number.

Now let's compute our sum:

6152 + 379.

you can use a calculator, but let's try another metod:

lets "breack" the second number 379 = 300 + 70 + 9 and do the additions one by one:

6152 + (300 + 70 + 9) = (6152 + 300) + 70 + 9 = (6452 + 70) + 9

now, 50 + 70 = 120; so we have

(6452 + 70) + 9  = 6522 + 9 = 6531

so 6152 + 379 = 6531

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