You pay $2.40 for 3/4 pounds of grapes . your friend buys a pound of grapes at the same time and estimates that he will pay $1.80. what can you say about your friends estimate ?

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2