1. Jika p = 2/3, q = ¾, r = 5/6 maka hitunglah nilai dari : pq+ pr

pq + pr
(2/3 × 3/4) + (2/3 × 5/6)
6/12 + 10/18
1/2 + 5/9
19/18 = 1.05 jika dibulatkan maka menjadi 1

p = 2/3

q = 3/4

r = 5/6

pq+pr = (2/3 x 3/4) + (2/3 x 5/6)
          = 6/12 + 10/18
          = 1/2 + 5/9
          = 9/18 + 10/18
          = 19/18.