JAMB Economics 1981 Question 31

Sector 1 (Agriculture): share in National Output 25%, share in total Employment 60%, growth rate of Sectoral Output 2%
Sector 2 (Manufacturing and Crafts): share in National Output 10%, share in total Employment 10%, growth rate of Sectoral Output 5%
Sector 3 (Petroleum and Mining): share in National Output 50%, share in total Employment 5%, growth rate of Sectoral Output 10%
Sector 4 (Services): share in National Output 15%, share in total Employment 25%, growth rate of Sectoral Output 3%
From the above, the growth rate of Total National Output or GDP is

1. A.6.45% i.e. (25x2+10x5+50x10+15x3)/100%
2. B.20.0%, i.e. (2+5+10+3)%
3. C.2.95%, i.e. (60x2+10x5+5x10+25x3)/100%
4. D.5.0%, i.e. (2+5+10+3)/4%
5. E.not obtainable.