Ball bearings are manufactured with diameters that are normally distributed with mean 1cm and standard deviation 0.05cm. Assume that 1000 ba

Almost anon,

5% would be more than 2 standard deviations AWAY from the mean.

Only 2.5% would be more than 2 standard deviations ABOVE the mean

so the answer is 2.5% of 1000

Just taking a guess at it.

0.1 cm is two standard deviations from the mean. Two standard deviations includes 95% of the samples, therefore 5% of the samples with be expected to be larger than this.