Question

Tiles have weights that are independently normally distributed with a mean of 45.3 and a standard deviation of 0.02. What is the probability that the total weight of the tiles is no more than 135.975.

Answer 1

My logic was find the probability of this for 1 tile and multiply by 3 but that doesn't work >.> .

Answer 2

was the last one correct?

Answer 3

the battery problem

Answer 4

Donno. It's due tomorrow :P .

Answer 5

but it made such perfect sense i'm sure it's right.

Answer 6

don't we need to knw how many tiles are there ?

Answer 7

Whoops typo.

Answer 8

okie

Answer 9

See new question :P .