Question 1159316
The first lot has mean of 1050 and sd of 100
z=(x-mean)/sd. Compare z scores and their resultant probability
the tolerance required is between 900 and 1100 ohms and that is between -1.5 and 0.5 sd or 62.5% probability

The second one has mean of 1000 and sd of 120
now the 900 to 1100 range are within +/- 0.83 sd That is about 59.5%.

Use M1.