for the graph (Q3) in ppr 62..
u could only possible get the median and the quartiles and the interquartile range..
how could you possible get the mean, for the mean you would have to add thee the 900 values and then divide by 900 which would tale ages
and standard divation wasnt possible either!
normally for cumulative frequesncy, all you have to calculate is median and the quartile stuff.
for the last question (Q7) in ppr 62
for part 3 , they asked for the way 3 out of 9 cards cud be arranged so isnt that just 3!=6..
for part 4 , they asked for different ways of the pink card >
P > pink N > normal
NNN (*3)
NPN
PNN
NNP
so there are 3 arrangments..
for part 5, they asked how many do not have the pink card next to the green card
G > green
NPG
NGP
PNG
PGN
GNP
GPN
so thats only 2 arrangements
i am sure about about Q3 but i am only 80% sure about Q7..
hope i helped!