Only 40% and 20% of females were graduates in villages A and C respectively. If the female population of villages A and C were equal, what is the respective ratio of the number of non-graduate females (including illiterate females) in villages A and C?

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Let the female population in each of villages A and C be $F$ (they are equal). From the table the percentage of literate females is: A = $70\%$, C = $72\%$. Interpret the given statement as "40% and 20% of female literates are graduates".

Step 1 — Graduate females:
- In A: $G_A = F	imes 0.70	imes 0.40 = 0.28F$.
- In C: $G_C = F	imes 0.72	imes 0.20 = 0.144F$.

Step 2 — Non-graduate females (including illiterate females):
- In A: $N_A = F - G_A = F - 0.28F = 0.72F$.
- In C: $N_C = F - G_C = F - 0.144F = 0.856F$.

Step 3 — Ratio $N_A:N_C$:
$$N_A:N_C = 0.72F:0.856F = 72:85.6 = 720:856 = \frac{720}{8}:\frac{856}{8} = 90:107.$$

Thus the required ratio is $90:107$. 
FINAL_ANSWER: b

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