Jika p = 2/3, q = ¾, r = 5/6 maka hitunglah nilai dari Pq+ pr

#pq
2/3×3/4 = 1/2

#pr
3/4×5/6 = 15/24 = 5/8

jadi pq + pr = 1/2 + 5/8 = 4+5/8 = 9/8

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.