In how many different ways can change be given for a 50 cent coin using only 20 cent, 10 cent, and 5 cent coins? Justify your an
2 answers:
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Number of girls at the time of the assembly started = w
Number of girls left = 40% of w
Remaining girls =
Now, the ratio of the number of boys to girls became 3 to 4.
Let n be the number of boys.
Then,
Or,
20n = 9w
or, n =
Total number of boys and girls =
Hence, the total number of boys and girs is