Identify the type of sampling used (random, systematic, convenience, stratified, or cluster sampling) in the situation described below. in a poll conducted by a certain research center, 809 adults were called after their telephone numbers were randomly generated by a computer, and 20 % were able to correctly identify the secretary of state. which type of sampling did the research center use?

This is random sampling.

Step-by-step explanation:

Given condition is - In a poll, 809 adults were called after their telephone numbers were randomly generated by a computer, and 20 % were able to correctly identify the secretary of state.

This research center used random sampling.

Random because the telephone numbers were randomly generated by the computer. It could have been any number and any person.

Other sampling methods either use groups to conduct survey or survey the easiest available sample as in convenience sampling. So, rest options are wrong.

Therefore, it is random sampling.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

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