Preciso saber qual o valor da variável (y)

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.