Answer:
(a) The probability that in a a sample of six British citizens two believe inequality is too large is 0.0375.
(b) The probability that in a a sample of six British citizens at least two believe inequality is too large is 0.9944.
(c) The probability that in a a sample of four British citizens none believe inequality is too large is 0.0046.
Step-by-step explanation:
The random variable <em>X</em> can be defined as the number of British citizens who believe that inequality is too large.
The proportion of respondents who believe that inequality is too large is, <em>p</em> = 0.74.
Thus, the random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em> = 0.74.
The probability mass function of <em>X </em>is:

(a)
Compute the probability that in a a sample of six British citizens two believe inequality is too large as follows:

Thus, the probability that in a a sample of six British citizens two believe inequality is too large is 0.0375.
(b)
Compute the probability that in a a sample of six British citizens at least two believe inequality is too large as follows:
P (X ≥ 2) = 1 - P (X < 2)
= 1 - P (X = 0) - P (X = 1)
![=1-[{6\choose 0}\ 0.74^{0}(1-0.74)^{6-0}]-[{6\choose 1}\ 0.74^{1}(1-0.74)^{6-1}]\\\\=1-[1\times 1\times 0.000308915776]-[6\times 0.74\times 0.0011881376]\\\\=1-0.00031-0.0053\\\\=0.99439\\\\\approx 0.9944](https://tex.z-dn.net/?f=%3D1-%5B%7B6%5Cchoose%200%7D%5C%200.74%5E%7B0%7D%281-0.74%29%5E%7B6-0%7D%5D-%5B%7B6%5Cchoose%201%7D%5C%200.74%5E%7B1%7D%281-0.74%29%5E%7B6-1%7D%5D%5C%5C%5C%5C%3D1-%5B1%5Ctimes%201%5Ctimes%200.000308915776%5D-%5B6%5Ctimes%200.74%5Ctimes%200.0011881376%5D%5C%5C%5C%5C%3D1-0.00031-0.0053%5C%5C%5C%5C%3D0.99439%5C%5C%5C%5C%5Capprox%200.9944)
Thus, the probability that in a a sample of six British citizens at least two believe inequality is too large is 0.9944.
(c)
Compute the probability that in a a sample of four British citizens none believe inequality is too large as follows:

Thus, the probability that in a a sample of four British citizens none believe inequality is too large is 0.0046.