# Answer on Statistics and Probability Question for Divyashree Bhat

Question #46251

In a test on electric bulbs, it was found that the life time of a

particular brand was

normally distributed with an average life of 2000 hours and S.D. of 60 hours. If a

firm purchases 2500 bulbs, find the number of bulbs that are likely to last for (i)

more than 2100 hours, (ii) less than 1950 hours and (iii) betwe

en 1900 and 2100

hours.

particular brand was

normally distributed with an average life of 2000 hours and S.D. of 60 hours. If a

firm purchases 2500 bulbs, find the number of bulbs that are likely to last for (i)

more than 2100 hours, (ii) less than 1950 hours and (iii) betwe

en 1900 and 2100

hours.

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