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A survey on British Social Attitudes asked respondents if they had ever boycotted goods for ethical...

A survey on British Social Attitudes asked respondents if they had ever boycotted goods for ethical reasons (Statesman, January 28, 2008). The survey found that 23% of the respondents have boycotted goods for ethical reasons.
a)In a sample of six British citizens, what is the probability that two have ever boycotted goods for ethical reasons?
b)In a sample of six British citizens, what is the probability that at least two respondents have boycotted goods for ethical reasons?
c)In a sample of ten British citizens, what is the probability that between 3 and 6 have boycotted goods for ethical reasons?
In a sample of ten British citizens, what is the expected number of people that have boycotted goods for ethical reasons? Also find the standard deviation.
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