A jar contains nine black buttons and seven brown if nine button are picked at random what is the probability that exactly five of them are black is it perm or comb

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

Which function has the domain x> -11

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8