The distance from Caxby to Drone is 45 miles. The distance from Drone to Elton is 20 miles.
45 miles
20 miles
H
Caxby
Drone
Elton
Colin drives from Caxby to Drone.
Then he drives from Drone to Elton.
Colin drives from Caxby to Drone at an average speed of 30 mph.
He drives from Drone to Elton at an average speed of 40 mph.
Work out Colin's average speed for the whole journey from Caxby to Elton.

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.