On a production line 2,500 bulbs were tested. Out of 2,500 bulbs, there were 2,200 bulbs that burnt out after more than 1,500 hours of use. Lucy purchased a light bulb what is the likelihood that it will burn for more than1,500?

Answer 1

The probability that Lucy's bulb will burn out after more than 1,500 hours of use can be calculated as the ratio of the number of bulbs that burnt out after more than 1,500 hours to the total number of bulbs tested:

Probability = Number of bulbs that burnt out after more than 1,500 hours / Total number of bulbs tested

Probability = 2,200 / 2,500

Probability = 0.88

Therefore, the probability that Lucy's bulb will burn out after more than 1,500 hours of use is 0.88 or 88%.