I need help please help!

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

Divide. write in simplest form 41/6 divided by 10

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers