Three types of chicken powder, N, P and Q come in containers of 60 g, 120 g and 150 g respectively. Containers of N, P and Q are mixed together in the ratio 1 : 4 : 7 to obtain 14.31 kg of an assortment of chicken powder.

1. How many containers of N and P are used altogether?
2. Find the difference between the combined weight of all the chicken powder in containers P and containers Q as compared to the chicken powder in containers N. Express the weight in kilograms.

	N	P	Q
Number	1 u	4 u	7 u
Value	60	120	150
Total value	60 u	480 u	1050 u

(a)
Total mass of chicken powder
= 60 u + 480 u + 1050 u
= 1590 u

1590 u = 14310

1 u = 14310 ÷ 1590 = 9

Total number of containers of N and P used
= 1 u + 4 u
= 5 u
= 5 x 9
= 45 

(b)
Combined weight of all the chicken powder in containers P and containers Q
= 480 u + 1050 u
= 1530 u

Difference between the combined weight of all the chicken powder in containers P and containers Q as compared to the chicken powder in containers N
= 1530 u - 60 u
= 1470 u
= 1470 x 9
= 13230 g
= 13.23 kg 

Answer(s): (a) 45; (b) 13.23 kg