Question

1) There were a total of 840 guests at a wedding dinner. 60% of them were adults, and the rest were children. Some boys left before the dessert was served. As a result, the percentage of adults increased to 70%. How many boys left before the dessert was served?

Answer 1

Adults = .6 * 840 = 504
children = .4 * 840 = 336

504 = .7 (840 - boys)

Answer 2

252

Answer 3

I got 120

Answer 4

I got 84.
840*.60=504
840*.70=588
588-504=84 boys.

Answer 5

132

Answer 6

104

Answer 7

120