5. (1 1/2) /3 =
(3/2) / (3) =
3/2 * 1/3 =
3/6 reduces to 1/2
6. 1 1/4 * 3/5 =
5/4 * 3/5 =
15/20 reduces to 3/4
7. mean of 6 and median of 8....
(8 + 8 + 8 + x) / 4 = 6
(24 + x) / 4 = 6
24 + x = 24
x = 24 - 24
x = 0
ur numbers are : 0,8,8,8.....has a median of 8 and a mean of 6
8. (a) probability of tails is 30/100 reduces to 3/10
(b) 70/100 = x/300
cross multiply
(100)(x) = (300)(70)
100x = 21000
x = 21000/100
x = 210 heads would be expected