Three groups of three people are to be selected from time people, of whom three are man teachers, two lady teachers and parents. Find the probability that i) the two lady teachers being in the same group.
ii) one group consists of at least two of the man teachers.​

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answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation: