Question

P( 1.05 < Z < 2.05) Need help solving please

Answer 1

in your Z table you can easily find P(Z>1.05)

also, P(Z>2.05)

So, you just want


P(Z>1.05) - P(Z>2.05)
or, you do it the other way:
P(Z<2.05) - P(Z<1.05)

even easier, go to

http://davidmlane.com/hyperstat/z_table.html

and specify Z between 1.05 and 2.05

You can then verify the result by using your Z table.