Fill in the blanks.
At a gathering,
12 of the boys and
313 of the girls and
919 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 -
313 =
1013Fraction of the adults who remained
= 1 -
919 =
1019The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 1, 10 and 10 = 10
1 x 102 x 10 of the boys =
10 x 113 x 1 of the girls =
10 x 119 x 1 of the adults
1020 of the boys =
1013 of the girls =
1019 of the adults
Boys : Girls : Adults
20 : 13 : 19
(a)
Number of boys at first = 20 u
(b)
Number of girls at first = 13 u
(c)
Number of adults at first = 19 u
(d)
Number of people who remained
= 3 x 10 u
= 30 u
Answer(s): (a) 20; (b) 13; (c) 19; (d) 30