Fill in the blanks.
At a gathering,
56 of the boys and
1720 of the girls and
1720 of the adults left after 1 hour.
The number of boys, girls, and adults who remained were the same.
- Number of boys at first = _____ u
- Number of girls at first = _____ u
- Number of adults at first = _____ u
- Number of people who remained = _____ u
(a)
Change fraction into units.
Fraction of the boys who remained
= 1 -
56=
16Fraction of the girls who remained
= 1 -
1720 =
320Fraction of the adults who remained
= 1 -
1720 =
320The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 1, 3 and 3 = 3
1 x 36 x 3 of the boys =
3 x 120 x 1 of the girls =
3 x 120 x 1 of the adults
318 of the boys =
320 of the girls =
320 of the adults
Boys : Girls : Adults
18 : 20 : 20
(a)
Number of boys at first = 18 u
(b)
Number of girls at first = 20 u
(c)
Number of adults at first = 20 u
(d)
Number of people who remained
= 3 x 3 u
= 9 u
Answer(s): (a) 18; (b) 20; (c) 20; (d) 9