Any help offered in solving the below question will be much appreciated.

Thanks

Kingman

The volume of water in milliliters in cartons is normally distributed with mean 't' and the standard deviation 8. Measurements were taken of the volume in 900 of these cartons and it is found that 225 of them contained more then 1002 milliliters.

1) Calculate the value of 't' (0.674)

2) Three of them 900 cartons are chosen at random. Calculate the probability that exactly 2 of them contain more than 1002 milliliters. (0.140)