Maths Question

a)

       2   4   6    8

1     3   5   7   9   

3     5   7   9  11

5     7   9   11 13

b)  The probability of a "7" is   3/12  = 1/4

This means that if 120 play the game, the school will collect   120 * 20p  = 2400p

But...1/4 of the people will win  =  30 people...and the school will have to spend 30 * 30p =

900p  for lollipops

So...the school will collect   2400 - 900  =   1500p