ABSTRACT
Determine for the data (a) the mean height and (b) the standard deviation (10)
5. Determine the probabilities of: (a) drawing a white ball from a bag containing
6 black and 14 white balls (b) winning a prize in a raffle by buying 6 tickets
when a total of 480 tickets are sold (c) selecting at random a female from a group of
12 boys and 28 girls (d) winning a prize in a raffle by buying 8 tickets
when there are 5 prizes and a total of 800 tickets are sold (8)
6. In a box containing 120 similar transistors 70 are satisfactory, 37 give too high a gain under normal operating conditions and the remainder give too low a gain.
