Fill in the blanks.
At a gathering,
12 of the boys and
18 of the girls and
1219 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 -
12=
12Fraction of the girls who remained
= 1 -
18 =
78Fraction of the adults who remained
= 1 -
1219 =
719The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 1, 7 and 7 = 7
1 x 72 x 7 of the boys =
7 x 18 x 1 of the girls =
7 x 119 x 1 of the adults
714 of the boys =
78 of the girls =
719 of the adults
Boys : Girls : Adults
14 : 8 : 19
(a)
Number of boys at first = 14 u
(b)
Number of girls at first = 8 u
(c)
Number of adults at first = 19 u
(d)
Number of people who remained
= 3 x 7 u
= 21 u
Answer(s): (a) 14; (b) 8; (c) 19; (d) 21