What was the number of schools having only facilities F1 and F4?
Started 1 month ago by Shashank in
Explanatory Answer
Assume only F1 & F2 = A
We know from condition 8 that F1 and F2 have 162 students
A + x + 40 + x = 162
F2 = 313 = 162 + 26 + 45 + 30 + x
x = 50 and A = 22
Now F1 & F4 have the same number of schools
We Calculate the values not common to both to balance the figures
F4 = 50 + 45 + 24 + 20 = 139
F1 = 50 + 25 + 22 + x = 139
x = 42
Now to calculate only F1 and F4
520 – 313 – 26 – 24 – 20 – 25 – 42 – 50 = 20
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