Math  /  Word Problems

QuestionFind the expected number of light bulbs lasting between 1050 and 1140 hours from 375 bulbs, given mean = 1100, SD = 60.

Studdy Solution
Calculate the expected number of light bulbs.
Expectednumber=0.5452×375=204.45Expected\, number =0.5452 \times375 =204.45Since we can't have a fraction of a light bulb, we round this to the nearest whole number. Therefore, we expect approximately204 light bulbs to last between1050 hours and1140 hours.

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