Question: The average sum with 10 girls is ` 45. When two more girls join, the average increases by ` 2. Find the average sum of

The average sum with 10 girls is ` 45.

When two more girls join, the average increases by ` 2.

Find the average sum of the two new girls.

(a) ` 57

(b) ` 54

(c) ` 48

(d) None of these.

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