zoey130
17.04.2020 •
Mathematics
Type A, type B, and type C lightbulbs are lasting longer today than ever before. On average, the number of bulb hours for a type C bulb is 18 times the number of bulb hours for a type B bulb. The number of bulb hours for a type A bulb is 1100 less than the type B bulb. If the total number of bulb hours for the three types of lightbulbs is 78900, find the number of bulb hours for each type.
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Ответ:
Step-by-step explanation:
Let and be independent random variables representing the lifetime (in 100 hours) of Type A and Type B light bulbs, respectively. Both variables have exponential distributions, and the mean of X is 2 and the mean of Y is 3.
Ответ:
Step-by-step explanation:
3/4+18 = use fraction calculator :)