A farmer brought 15 watermelons to a picnic. Each watermelon was cut into 6 slices. If each person ate only one slice, how many people had watermelon?​

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

How to do this , and can some one explain