Eighteen-carat gold contains 18 parts by weight of gold and 6 parts of other metals. (Twenty-four-carat gold is pure.) Fourteen-carat gold contains 14 parts of gold and 10 parts of other metals. How many ounces of fourteen-carat gold need to be mixed with 12 ounces of eighteen-carat gold to make seventeen-carat gold?

Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.