Acar is designed to last an average of 12 years with a standard deviation of 0.8 years. what is the probability that a car will last less than 10 years?

\frac{10-12}{0.8} = -2.5; Probability(-2.5)=.0.00621; Probability = 0.621%

So the answer is 0.621%

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6