an association wants to conduct a telephone interview to collect public opinion on introducing a sales tax in hk.the probability of a successful telephone interview where valid data are collected is 0.1.suppose that 50 calls were made on a certain morning.
find the probabilities that
1.all interview attempts fail
2.there is at least one successful interview
- wkho28Lv 79 年前最愛解答
1. The probability of a successful telephone interview is 0.1.
The probability that an interview attempt fails is: 1-0.1=0.9.
The probability that 2 interview attempts fail is:
The probability that all 50 interview attempts fail is:
2. The probability that there is at least one successful interview is: