The ages of all kindergarten children are normally distributed with mean 3 years and standard deviation 8 months.

The ages of all kindergarten children are normally distributed with 

mean 3 years and standard deviation 8 months.  

If 25 kindergarten children are randomly selected,

what is the probability that their mean age 

will be younger than 2 years 10 months old?  

Use Table A-2 and answer as a decimal with 4 decimal places.