Rachel collected 56 rocks at the beach. she is placing them into bags to give to her friends. she says that if she puts 4 rocks in each bags, she will have 16 rocks left after she makes 10 bags. is she correct

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.