Question

Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally​ distributed, with a mean life o​f 1700hr and a standard deviation of 50hr.if 60000 of these bulbs are produced, how many can be expected to last at least 1700hr?the number of light bulbs that can be expected to last at least 1700hr is

Answer 1

sory i cant help you sory