JAMB UTME - Economics - 2018

When a group data is involved, cumulative frequency is used. The formula will be:

  Median=[(N+1)/2]th

  For member of odd number items. That is, where N is odd

  Median=([N/2[N/2+1]th)/2

  For member of odd number items. That is, where N is odd

  Solution:

When a group data is involved, cumulative frequency is used. The formula will be:

  Median=[(N+1)/2]th

  For member of odd number items. That is, where N is odd

  Median=([N/2[N/2+1]th)/2

  For member of odd number items. That is, where N is odd

  Solution:

Average revenue is obtained by dividing the total revenue by the number of units sold. Thus we have;

660/6 = 110 

Total budget = N100,000,000

  Portion of pie chart covered in degree = 360

  Expenditure on manufacturing = x/N100,000,000 × 3600 = 360

  3600x = 360 × N100,000,000

  x = 360×N100,000,000/3600

  x=N10,000,000

  Therefore, the budget allocated to Manufacturing is N10,000,000

  Total budget = N100,000,000

  Portion of pie chart covered in degree = 720

  Expenditure on Agriculture = x/N100,000,000 × 3600 = 720

  3600x = 720 × N100,000,000

  x = 720 × N100,000,000/3600

  x = N20,000,000

  Therefore, the budget allocated to Agriculture is N20,000,000

  Ratio of expenditure on Manufacturing to Agriculture;

  Ratio = 10,000,000:20,000,000

  =1:2

When a group data is involved, cumulative frequency is used. The formula will be: Median=[(N+1)/2]th

  For member of odd number items. That is, where N is odd

  Median=([N/2]th + [N/2 + 1]th)/2

  For member of odd number items. That is, where N is odd

  Solution:

  From the table, there are 20 members as indicated by the cumulative frequency. Since the members are odd (10) the median age will be ([N/2]th + [N/2 + 1]th)/2

  Median=([10/2]th + [10/2 + 1]th)/2

  =(5th + 6th)/2

  The 5th member is 3 and the 6th member is on 3

  Median=(3 + 3)/2

  =6/2

  Median = 3

External economies of scale are economies of scale which a firm enjoys by virtue of being in an industry or environment where for instance, similar firms are located, as this question asks about. They are still economies of scale though, so technically B could also be correct. This is one of those tricky questions.

Y = C + I
Y = 50 + 0.75 + 45
Y - 0.75 = 50 + 45
Y (1 - 0.75) = 95
0.25y = 95
Y = 95/0.25
Y = 380