Question

: As a result of a test on bulbs manufactured by a company, it was found that the lifetime

of the bulbs follow a Normal distribution with average life as 2040 hours and standard deviation as 60.

How many bulbs in a lot of 40000are expected to last for more than 2150 hours or less than 1960 hours?

How many of these bulbs are expected to have lives within two standard deviations on either side of

mean?​

Answer 1

Answer:

heyaaaaaa aaaa ur answerrrr is π hope it helpsss