For two independent events a and b, p(a)=0.50, and p(b)=0.45. find p(a and b)

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?