推 wangyihui400:懂了!謝謝!! 03/20 22:09
: A string of 10 lightbulbs is wired in such a way that if
: any individual lightbulb fails, the entire string fails. If for
: each individual lightbulb the probability of failing during
: time period T id 0.06, what is the probability that the
: string of lightbulbs will fail during time period T?
: A.0.06
: B.(0.06)^10
: C.1-(0.06)^10
: D.(0.94)^10
: ﹡ E.1-(0.94)^10
: 這題題目看不大懂...
: GWD27
: Q31:
: A certain quantity is measured on two different scales, the R-scale and the
: S-scale, that are related linearly. Measurements on the R-scale of 6 and 24
: correspond to measurements on the S-scale of 30 and 60, respectively. What
: measurement on the R-scale corresponds to a measurement of 100 on the S-scale?
: A. 20
: B. 36
: ﹡C. 48
: D. 60
: E. 84
: 我算D...不知道是不是我算錯了...
: 麻煩幫我解答一下...謝謝!!
第一題問的是在T這個期間之內這串燈泡不亮的機率，由於一顆燈泡不亮就會造成整串燈
泡不亮，因此整串不亮的機率為1減這10顆燈泡都亮的機率，10顆燈泡都亮著的機率為0.94
的10次方，故為1-(0.94)^10。
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