Question

15 people decided to contribute Rs 1800 each for a community get together. However few of
them were unable to contribute, so the remaining persons had to contribute Rs 1200 more per
head. The number of people who were unable to contribute are:
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Answer 1

Answer:

No. of people decided to contribute rs.1800 = 15

No. of people used to contribute rs. 1200 =?

So,

1800/1200 (lowest form)

4/1

So,

Your answer is 4